diff --git a/frontend/src/e2e-test/dev-api/fixtures.ts b/frontend/src/e2e-test/dev-api/fixtures.ts
index abf05e9fd46..b13a5725c1f 100644
--- a/frontend/src/e2e-test/dev-api/fixtures.ts
+++ b/frontend/src/e2e-test/dev-api/fixtures.ts
@@ -497,7 +497,7 @@ export class Fixture {
         LocalDate.todayInSystemTz()
       ),
       modified: HelsinkiDateTime.now(),
-      modifiedBy: systemInternalUser,
+      modifiedByName: systemInternalUser,
       ...initial
     })
   }
@@ -513,7 +513,7 @@ export class Fixture {
         LocalDate.todayInSystemTz()
       ),
       modified: HelsinkiDateTime.now(),
-      modifiedBy: systemInternalUser,
+      modifiedByName: systemInternalUser,
       ...initial
     })
   }
@@ -529,7 +529,7 @@ export class Fixture {
         LocalDate.todayInSystemTz()
       ),
       modified: HelsinkiDateTime.now(),
-      modifiedBy: systemInternalUser,
+      modifiedByName: systemInternalUser,
       ...initial
     })
   }
@@ -545,7 +545,7 @@ export class Fixture {
         LocalDate.todayInSystemTz()
       ),
       modified: HelsinkiDateTime.now(),
-      modifiedBy: systemInternalUser,
+      modifiedByName: systemInternalUser,
       ...initial
     })
   }
@@ -1159,7 +1159,7 @@ export class Fixture {
       ),
       coefficient: 1.0,
       modifiedAt: null,
-      modifiedBy: null,
+      modifiedByName: null,
       ...initial
     })
   }
@@ -3087,4 +3087,4 @@ export const DecisionIncomeFixture = (total: number): DecisionIncome => ({
 
 export const nullUUID = '00000000-0000-0000-0000-000000000000'
 
-export const systemInternalUser = nullUUID
+export const systemInternalUser = 'eVaka'
diff --git a/frontend/src/e2e-test/generated/api-types.ts b/frontend/src/e2e-test/generated/api-types.ts
index 849e0e46fcf..fc67ba4e513 100644
--- a/frontend/src/e2e-test/generated/api-types.ts
+++ b/frontend/src/e2e-test/generated/api-types.ts
@@ -189,7 +189,7 @@ export interface DevAssistanceFactor {
   childId: UUID
   id: UUID
   modified: HelsinkiDateTime
-  modifiedBy: UUID
+  modifiedByName: UUID
   validDuring: FiniteDateRange
 }
 
@@ -466,7 +466,7 @@ export interface DevDaycareAssistance {
   id: UUID
   level: DaycareAssistanceLevel
   modified: HelsinkiDateTime
-  modifiedBy: UUID
+  modifiedByName: UUID
   validDuring: FiniteDateRange
 }
 
@@ -642,7 +642,7 @@ export interface DevOtherAssistanceMeasure {
   childId: UUID
   id: UUID
   modified: HelsinkiDateTime
-  modifiedBy: UUID
+  modifiedByName: UUID
   type: OtherAssistanceMeasureType
   validDuring: FiniteDateRange
 }
@@ -771,7 +771,7 @@ export interface DevPreschoolAssistance {
   id: UUID
   level: PreschoolAssistanceLevel
   modified: HelsinkiDateTime
-  modifiedBy: UUID
+  modifiedByName: UUID
   validDuring: FiniteDateRange
 }
 
diff --git a/frontend/src/e2e-test/specs/5_employee/unit-groups.spec.ts b/frontend/src/e2e-test/specs/5_employee/unit-groups.spec.ts
index b6f69528df3..dd18c4fa94a 100644
--- a/frontend/src/e2e-test/specs/5_employee/unit-groups.spec.ts
+++ b/frontend/src/e2e-test/specs/5_employee/unit-groups.spec.ts
@@ -199,7 +199,7 @@ describe('Unit groups - unit supervisor', () => {
       childId: child1Fixture.id,
       capacityFactor: 1.5,
       validDuring: new FiniteDateRange(placementStartDate, placementEndDate),
-      modifiedBy: systemInternalUser
+      modifiedByName: systemInternalUser
     }).save()
 
     const groupsPage = await loadUnitGroupsPage()
diff --git a/frontend/src/lib-common/generated/api-types/assistance.ts b/frontend/src/lib-common/generated/api-types/assistance.ts
index 0c4218330bc..b3653597fc5 100644
--- a/frontend/src/lib-common/generated/api-types/assistance.ts
+++ b/frontend/src/lib-common/generated/api-types/assistance.ts
@@ -59,7 +59,7 @@ export interface DaycareAssistance {
   id: UUID
   level: DaycareAssistanceLevel
   modified: HelsinkiDateTime
-  modifiedBy: string
+  modifiedByName: string
   validDuring: FiniteDateRange
 }
 
@@ -98,7 +98,7 @@ export interface OtherAssistanceMeasure {
   childId: UUID
   id: UUID
   modified: HelsinkiDateTime
-  modifiedBy: string
+  modifiedByName: string
   type: OtherAssistanceMeasureType
   validDuring: FiniteDateRange
 }
@@ -141,7 +141,7 @@ export interface PreschoolAssistance {
   id: UUID
   level: PreschoolAssistanceLevel
   modified: HelsinkiDateTime
-  modifiedBy: string
+  modifiedByName: string
   validDuring: FiniteDateRange
 }