diff --git a/db/bill.ts b/db/bill.ts
index 623a6f5..8c47808 100644
--- a/db/bill.ts
+++ b/db/bill.ts
@@ -34,7 +34,8 @@ const BillSchema = new mongoose.Schema<BillDocument>(
 
           return v <= bill.milageEnd
         },
-        message: (props) => `${props.value} is bigger than milageEnd!`,
+        message: (props: { value: Number }) =>
+          `${props.value} is bigger than milageEnd!`,
       },
     },
     milageEnd: {
@@ -47,7 +48,8 @@ const BillSchema = new mongoose.Schema<BillDocument>(
 
           return v >= bill.milageStart
         },
-        message: (props) => `${props.value} is smaller than milageStart!`,
+        message: (props: { value: Number }) =>
+          `${props.value} is smaller than milageStart!`,
       },
     },
     tarif: {
diff --git a/db/booking.ts b/db/booking.ts
index 91819a4..fd5f131 100644
--- a/db/booking.ts
+++ b/db/booking.ts
@@ -1,6 +1,7 @@
 import * as mongoose from 'mongoose'
 import { v4 as uuidv4 } from 'uuid'
 import { dateFormatBackend, getDays, nowInTz } from '../helpers/date'
+
 import { Bill } from './bill'
 import { Booker } from './booker'
 import { BOOKING_STATUS } from './enums'
@@ -49,13 +50,23 @@ const BookingSchema = new mongoose.Schema<BookingDocument>(
       type: Date,
       required: true,
       get: dateFormatBackend,
-      min: nowInTz(),
+      validate: {
+        validator: function (v: Date) {
+          return v >= nowInTz()
+        },
+        message: (props: { value: Date }) => `${props.value} is in the past`,
+      },
     },
     endDate: {
       type: Date,
       required: false,
       get: dateFormatBackend,
-      min: nowInTz(),
+      validate: {
+        validator: function (v: Date) {
+          return v >= nowInTz()
+        },
+        message: (props: { value: Date }) => `${props.value} is in the past`,
+      },
     },
     days: {
       type: [String],
diff --git a/db/index.ts b/db/index.ts
index e51a5b6..9df41ac 100644
--- a/db/index.ts
+++ b/db/index.ts
@@ -72,14 +72,11 @@ export async function createBooking({
     bookedDays.includes(day)
   )
   if (doubleBookedDays.length) {
-    const error = new mongoose.Error.ValidationError(booking)
-    error.addError(
-      'days',
-      new mongoose.Error.ValidatorError({
-        message: `${doubleBookedDays
-          .map((dateString) => dateFormatFrontend(new Date(dateString)))
-          .join(', ')} schon gebucht`,
-      })
+    const error = new mongoose.Error.ValidationError(booking.uuid)
+    error.errors.days = new mongoose.Error.ValidatorError(
+      `${doubleBookedDays
+        .map((dateString) => dateFormatFrontend(new Date(dateString)))
+        .join(', ')} schon gebucht`
     )
     throw error
   }