diff --git a/website/server/libs/baseModel.js b/website/server/libs/baseModel.js
index e2a0e6700b..544eba8f77 100644
--- a/website/server/libs/baseModel.js
+++ b/website/server/libs/baseModel.js
@@ -12,7 +12,7 @@ export default function baseModel (schema, options = {}) {
       _id: {
         $type: String,
         default: uuid,
-        validate: [v => validator.isUUID(v), 'Invalid uuid.'],
+        validate: [v => validator.isUUID(v), 'Invalid uuid in baseModel.'],
       },
     });
   }
diff --git a/website/server/models/challenge.js b/website/server/models/challenge.js
index 5f37c3aa9e..c73693922a 100644
--- a/website/server/models/challenge.js
+++ b/website/server/models/challenge.js
@@ -32,10 +32,10 @@ const schema = new Schema({
     rewards: [{ $type: String, ref: 'Task' }],
   },
   leader: {
-    $type: String, ref: 'User', validate: [v => validator.isUUID(v), 'Invalid uuid.'], required: true,
+    $type: String, ref: 'User', validate: [v => validator.isUUID(v), 'Invalid uuid for challenge leader.'], required: true,
   },
   group: {
-    $type: String, ref: 'Group', validate: [v => validator.isUUID(v), 'Invalid uuid.'], required: true,
+    $type: String, ref: 'Group', validate: [v => validator.isUUID(v), 'Invalid uuid for challenge group.'], required: true,
   },
   memberCount: { $type: Number, default: 0 },
   prize: { $type: Number, default: 0, min: 0 },
diff --git a/website/server/models/group.js b/website/server/models/group.js
index de9704c4ea..4078ee0a5a 100644
--- a/website/server/models/group.js
+++ b/website/server/models/group.js
@@ -77,7 +77,7 @@ export const schema = new Schema({
   summary: { $type: String, maxlength: MAX_SUMMARY_SIZE_FOR_GUILDS },
   description: String,
   leader: {
-    $type: String, ref: 'User', validate: [v => validator.isUUID(v), 'Invalid uuid.'], required: true,
+    $type: String, ref: 'User', validate: [v => validator.isUUID(v), 'Invalid uuid for group leader.'], required: true,
   },
   type: { $type: String, enum: ['guild', 'party'], required: true },
   privacy: {
diff --git a/website/server/models/iapPurchaseReceipt.js b/website/server/models/iapPurchaseReceipt.js
index b06b3e090a..be8a1eece6 100644
--- a/website/server/models/iapPurchaseReceipt.js
+++ b/website/server/models/iapPurchaseReceipt.js
@@ -8,7 +8,7 @@ export const schema = new Schema({
   _id: { $type: String, required: true }, // Use a custom string as _id
   consumed: { $type: Boolean, default: false, required: true },
   userId: {
-    $type: String, ref: 'User', required: true, validate: [v => validator.isUUID(v), 'Invalid uuid.'],
+    $type: String, ref: 'User', required: true, validate: [v => validator.isUUID(v), 'Invalid uuid for iapPurchaseReceipt.'],
   },
 }, {
   strict: true,
diff --git a/website/server/models/subscriptionPlan.js b/website/server/models/subscriptionPlan.js
index d59e10b14f..127b89935a 100644
--- a/website/server/models/subscriptionPlan.js
+++ b/website/server/models/subscriptionPlan.js
@@ -5,7 +5,7 @@ import baseModel from '../libs/baseModel';
 export const schema = new mongoose.Schema({
   planId: String,
   subscriptionId: String,
-  owner: { $type: String, ref: 'User', validate: [v => validator.isUUID(v), 'Invalid uuid.'] },
+  owner: { $type: String, ref: 'User', validate: [v => validator.isUUID(v), 'Invalid uuid for subscription owner.'] },
   quantity: { $type: Number, default: 1 },
   paymentMethod: String, // enum: ['Paypal', 'Stripe', 'Gift', 'Amazon Payments', 'Google', '']}
   customerId: String, // Billing Agreement Id in case of Amazon Payments
diff --git a/website/server/models/tag.js b/website/server/models/tag.js
index 270472dd24..1fa8bc59a7 100644
--- a/website/server/models/tag.js
+++ b/website/server/models/tag.js
@@ -9,7 +9,7 @@ export const schema = new Schema({
   id: {
     $type: String,
     default: uuid,
-    validate: [v => validator.isUUID(v), 'Invalid uuid.'],
+    validate: [v => validator.isUUID(v), 'Invalid uuid for tag.'],
     required: true,
   },
   name: { $type: String, required: true },
diff --git a/website/server/models/task.js b/website/server/models/task.js
index 5c336b89fa..9e78834796 100644
--- a/website/server/models/task.js
+++ b/website/server/models/task.js
@@ -40,7 +40,7 @@ export const taskIsGroupOrChallengeQuery = {
 const reminderSchema = new Schema({
   _id: false,
   id: {
-    $type: String, validate: [v => validator.isUUID(v), 'Invalid uuid.'], default: shared.uuid, required: true,
+    $type: String, validate: [v => validator.isUUID(v), 'Invalid uuid for task reminder.'], default: shared.uuid, required: true,
   },
   startDate: { $type: Date },
   time: { $type: Date, required: true },
@@ -93,7 +93,7 @@ export const TaskSchema = new Schema({
   },
   tags: [{
     $type: String,
-    validate: [v => validator.isUUID(v), 'Invalid uuid.'],
+    validate: [v => validator.isUUID(v), 'Invalid uuid for task tags.'],
   }],
   // redness or cost for rewards Required because it must be settable (for rewards)
   value: { $type: Number, default: 0, required: true },
@@ -107,27 +107,27 @@ export const TaskSchema = new Schema({
     ],
   },
   attribute: { $type: String, default: 'str', enum: ['str', 'con', 'int', 'per'] },
-  userId: { $type: String, ref: 'User', validate: [v => validator.isUUID(v), 'Invalid uuid.'] }, // When not set it belongs to a challenge
+  userId: { $type: String, ref: 'User', validate: [v => validator.isUUID(v), 'Invalid uuid for task owner.'] }, // When not set it belongs to a challenge
 
   challenge: {
     shortName: { $type: String },
-    id: { $type: String, ref: 'Challenge', validate: [v => validator.isUUID(v), 'Invalid uuid.'] }, // When set (and userId not set) it's the original task
-    taskId: { $type: String, ref: 'Task', validate: [v => validator.isUUID(v), 'Invalid uuid.'] }, // When not set but challenge.id defined it's the original task
+    id: { $type: String, ref: 'Challenge', validate: [v => validator.isUUID(v), 'Invalid uuid for task challenge.'] }, // When set (and userId not set) it's the original task
+    taskId: { $type: String, ref: 'Task', validate: [v => validator.isUUID(v), 'Invalid uuid for task challenge task.'] }, // When not set but challenge.id defined it's the original task
     broken: { $type: String, enum: ['CHALLENGE_DELETED', 'TASK_DELETED', 'UNSUBSCRIBED', 'CHALLENGE_CLOSED', 'CHALLENGE_TASK_NOT_FOUND'] }, // CHALLENGE_TASK_NOT_FOUND comes from v3 migration
     winner: String, // user.profile.name of the winner
   },
 
   group: {
-    id: { $type: String, ref: 'Group', validate: [v => validator.isUUID(v), 'Invalid uuid.'] },
+    id: { $type: String, ref: 'Group', validate: [v => validator.isUUID(v), 'Invalid uuid for task group.'] },
     broken: { $type: String, enum: ['GROUP_DELETED', 'TASK_DELETED', 'UNSUBSCRIBED'] },
-    assignedUsers: [{ $type: String, ref: 'User', validate: [v => validator.isUUID(v), 'Invalid uuid.'] }],
+    assignedUsers: [{ $type: String, ref: 'User', validate: [v => validator.isUUID(v), 'Invalid uuid for task group user.'] }],
     assignedDate: { $type: Date },
-    taskId: { $type: String, ref: 'Task', validate: [v => validator.isUUID(v), 'Invalid uuid.'] },
+    taskId: { $type: String, ref: 'Task', validate: [v => validator.isUUID(v), 'Invalid uuid for task group task.'] },
     approval: {
       required: { $type: Boolean, default: false },
       approved: { $type: Boolean, default: false },
       dateApproved: { $type: Date },
-      approvingUser: { $type: String, ref: 'User', validate: [v => validator.isUUID(v), 'Invalid uuid.'] },
+      approvingUser: { $type: String, ref: 'User', validate: [v => validator.isUUID(v), 'Invalid uuid task group approvingUser.'] },
       requested: { $type: Boolean, default: false },
       requestedDate: { $type: Date },
     },
@@ -292,7 +292,7 @@ const dailyTodoSchema = () => ({
     text: { $type: String, required: false, default: '' }, // required:false because it can be empty on creation
     _id: false,
     id: {
-      $type: String, default: shared.uuid, required: true, validate: [v => validator.isUUID(v), 'Invalid uuid.'],
+      $type: String, default: shared.uuid, required: true, validate: [v => validator.isUUID(v), 'Invalid uuid for task checklist item.'],
     },
     linkId: { $type: String },
   }],
diff --git a/website/server/models/user/schema.js b/website/server/models/user/schema.js
index b8a7cffe05..11dfe555bb 100644
--- a/website/server/models/user/schema.js
+++ b/website/server/models/user/schema.js
@@ -404,7 +404,7 @@ export default new Schema({
     default: () => ({}),
   },
 
-  challenges: [{ $type: String, ref: 'Challenge', validate: [v => validator.isUUID(v), 'Invalid uuid.'] }],
+  challenges: [{ $type: String, ref: 'Challenge', validate: [v => validator.isUUID(v), 'Invalid uuid for user challenges.'] }],
 
   invitations: {
     // Using an array without validation because otherwise mongoose
@@ -424,7 +424,7 @@ export default new Schema({
         $type: String,
         ref: 'Group',
         required: true,
-        validate: [v => validator.isUUID(v), 'Invalid uuid.'],
+        validate: [v => validator.isUUID(v), 'Invalid uuid for user invitation party id.'],
       },
       name: {
         $type: String,
@@ -434,15 +434,15 @@ export default new Schema({
         $type: String,
         ref: 'User',
         required: true,
-        validate: [v => validator.isUUID(v), 'Invalid uuid.'],
+        validate: [v => validator.isUUID(v), 'Invalid uuid for user invitation inviter id.'],
       },
     }],
   },
 
-  guilds: [{ $type: String, ref: 'Group', validate: [v => validator.isUUID(v), 'Invalid uuid.'] }],
+  guilds: [{ $type: String, ref: 'Group', validate: [v => validator.isUUID(v), 'Invalid uuid for user guild.'] }],
 
   party: {
-    _id: { $type: String, validate: [v => validator.isUUID(v), 'Invalid uuid.'], ref: 'Group' },
+    _id: { $type: String, validate: [v => validator.isUUID(v), 'Invalid uuid for user party.'], ref: 'Group' },
     order: { $type: String, default: 'level' },
     orderAscending: { $type: String, default: 'ascending' },
     quest: {
diff --git a/website/server/models/userNotification.js b/website/server/models/userNotification.js
index 27d1c21953..6e28ed2777 100644
--- a/website/server/models/userNotification.js
+++ b/website/server/models/userNotification.js
@@ -59,7 +59,7 @@ export const schema = new Schema({
   id: {
     $type: String,
     default: uuid,
-    validate: [v => validator.isUUID(v), 'Invalid uuid.'],
+    validate: [v => validator.isUUID(v), 'Invalid uuid for userNotification.'],
     // @TODO: Add these back once we figure out the issue with notifications
     // See Fix for https://github.com/HabitRPG/habitica/issues/9923
     // required: true,