diff --git a/pages/api/email.ts b/pages/api/email.ts
index b8c2161..14ee1de 100644
--- a/pages/api/email.ts
+++ b/pages/api/email.ts
@@ -106,6 +106,7 @@ export default async function handler(req, res) {
                     },
                     data: {
                         publisherId: userId,
+                        originalPublisherId: originalPublisher.id,
                         publicGuid: null, // if this exists, we consider the request open
                         isConfirmed: true
                     }
diff --git a/pages/api/index.ts b/pages/api/index.ts
index 736fdda..f928d8c 100644
--- a/pages/api/index.ts
+++ b/pages/api/index.ts
@@ -2,7 +2,7 @@ import { getToken } from "next-auth/jwt";
 import { authOptions } from './auth/[...nextauth]'
 import { getServerSession } from "next-auth/next"
 import { NextApiRequest, NextApiResponse } from 'next'
-import { DayOfWeek, AvailabilityType, UserRole } from '@prisma/client';
+import { DayOfWeek, AvailabilityType, UserRole, EventLogType } from '@prisma/client';
 const common = require('../../src/helpers/common');
 const dataHelper = require('../../src/helpers/data');
 const subq = require('../../prisma/bl/subqueries');
@@ -11,6 +11,7 @@ import { addMinutes } from 'date-fns';
 import fs from 'fs';
 import path from 'path';
 import { all } from "axios";
+import { logger } from "src/helpers/common";
 
 /**
  * 
@@ -821,10 +822,70 @@ async function replaceInAssignment(oldPublisherId, newPublisherId, shiftId) {
     },
     data: {
       publisherId: newPublisherId,
+      originalPublisherId: oldPublisherId,
       isConfirmed: false,
       isBySystem: true,
       isMailSent: false
     }
   });
+
+  // log the event
+  let shift = await prisma.shift.findUnique({
+    where: {
+      id: shiftId
+    },
+    select: {
+      startTime: true,
+      cartEvent: {
+        select: {
+          location: {
+            select: {
+              name: true
+            }
+          }
+        }
+      }
+    },
+    include: {
+      assignments: {
+        include: {
+          publisher: {
+            select: {
+              firstName: true,
+              lastName: true,
+              email: true
+            }
+          }
+        }
+      }
+    }
+  });
+  let publishers = await prisma.publisher.findMany({
+    where: {
+      id: { in: [oldPublisherId, newPublisherId] }
+    },
+    select: {
+      id: true,
+      firstName: true,
+      lastName: true,
+      email: true
+    }
+  });
+  let originalPublisher = publishers.find(p => p.id == oldPublisherId);
+  let newPublisher = publishers.find(p => p.id == newPublisherId);
+  let eventLog = await prisma.eventLog.create({
+    data: {
+      date: new Date(),
+      publisher: { connect: { id: oldPublisherId } },
+      shift: { connect: { id: shiftId } },
+      type: EventLogType.AssignmentReplacementManual,
+      content: "Въведено заместване от " + originalPublisher.firstName + " " + originalPublisher.lastName + ". Ще го замества " + newPublisher.firstName + " " + newPublisher.lastName + "."
+
+    }
+  });
+
+  logger.info("User: " + originalPublisher.email + " replaced his assignment for " + shift.cartEvent.location.name + " " + shift.startTime.toISOString() + " with " + newPublisher.firstName + " " + newPublisher.lastName + "<" + newPublisher.email + ">. EventLogId: " + eventLog.id + "");
+
+
   return result;
 }
\ No newline at end of file
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 8341d0d..25f0496 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -277,6 +277,7 @@ model Message {
 }
 
 enum EventLogType {
+  AssignmentReplacementManual
   AssignmentReplacementRequested
   AssignmentReplacementAccepted
   SentEmail