diff --git a/app/pages/main/volunteering/logs/page.js b/app/pages/main/volunteering/logs/page.js
index 9b1654f..1b6041e 100644
--- a/app/pages/main/volunteering/logs/page.js
+++ b/app/pages/main/volunteering/logs/page.js
@@ -62,6 +62,7 @@ function LogsPage() {
       },
       callback: (data) => {
         if (data.data.length != 0) {
+          // console.log(data);
           setUsers(
             data.data.map((e) => {
               return { ...e, name: `${e.firstName} ${e.lastName}`}
@@ -95,14 +96,17 @@ function LogsPage() {
       },
       callback: (data) => {
         if (data.length == 0) return;
+        console.log(data.data);
 
         const newLogs = data.data.map((e) => {
           const p1 = e.LoggedByUser;
           const p2 = e.LoggedForUser;
+          const p1name = p1 ? `${p1.firstName} ${p1.lastName}` : null
+          const p2name = p2 ? `${p2.firstName} ${p2.lastName}` : null;
           return {
             ...e,
-            loggedBy: `${p1.firstName} ${p1.lastName}`,
-            loggedFor: `${p2.firstName} ${p2.lastName}`,
+            loggedBy: p1name,
+            loggedFor: p2name,
             vouchers: e.duration * 0.5,
             workedAt_num: parseISO(e.workedAt).getTime(),
             workedAt: format(
@@ -115,8 +119,7 @@ function LogsPage() {
         const newVouchers = data.data
           .filter((e) => {
             const person = e.LoggedForUser;
-            const personId = person.id;
-            return personId == session.data.user.id;
+            return person && person.id == session.data.user.id;
           })
           .reduce((total, e) => {
             return (total += e.duration * 0.5);
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 554a9e9..37f8b13 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -228,20 +228,20 @@ model ActivateToken {
   createdAt   DateTime? @default(now())
   updatedAt   DateTime?
   userId      String
-  User        User      @relation(fields: [userId], references: [id])
+  User        User      @relation(fields: [userId], references: [id], onDelete: Cascade)
 
   @@index([userId], map: "ActivateToken_userId_fkey")
 }
 
 model VoucherLog {
   id          String   @id @default(cuid())
-  loggedFor   String
+  loggedFor   String?
   usedAt      DateTime @default(now()) @db.Timestamp(0)
   amount      Int
   description String   @db.VarChar(120)
   semesterId  Int
   Semester    Semester @relation(fields: [semesterId], references: [id], onDelete: NoAction, onUpdate: NoAction, map: "VoucherLog_Semester")
-  User        User     @relation(fields: [loggedFor], references: [id], onDelete: NoAction, onUpdate: NoAction, map: "loggedFor0")
+  User        User?    @relation(fields: [loggedFor], references: [id], onUpdate: NoAction, map: "loggedFor0")
 
   @@index([id], map: "logID_idx")
   @@index([loggedFor], map: "loggedFor_idx")
@@ -251,16 +251,16 @@ model VoucherLog {
 /// The underlying table does not contain a valid unique identifier and can therefore currently not be handled by Prisma Client.
 model WorkLog {
   id            String    @id @default(cuid())
-  loggedBy      String
-  loggedFor     String
+  loggedBy      String?
+  loggedFor     String?
   workedAt      DateTime? @db.Timestamp(0)
   createdAt     DateTime? @default(now()) @db.Timestamp(0)
   duration      Int?
   description   String?   @db.VarChar(120)
   semesterId    Int
   Semester      Semester  @relation(fields: [semesterId], references: [id], onDelete: NoAction, onUpdate: NoAction, map: "WorkLog_Semester")
-  LoggedByUser  User      @relation("WorkLog_loggedByToUser", fields: [loggedBy], references: [id], onDelete: NoAction, onUpdate: NoAction, map: "loggedBy")
-  LoggedForUser User      @relation("WorkLog_loggedForToUser", fields: [loggedFor], references: [id], onDelete: NoAction, onUpdate: NoAction, map: "loggedFor")
+  LoggedByUser  User?     @relation("WorkLog_loggedByToUser", fields: [loggedBy], references: [id], onUpdate: NoAction, map: "loggedBy")
+  LoggedForUser User?     @relation("WorkLog_loggedForToUser", fields: [loggedFor], references: [id], onUpdate: NoAction, map: "loggedFor")
 
   @@index([id], map: "logID_idx")
   @@index([loggedBy], map: "loggedBy_idx")