diff --git a/src/function/sync/apply-actions/dispatch-child-action/childchangepassword.ts b/src/function/sync/apply-actions/dispatch-child-action/childchangepassword.ts
index 1ba8d25..3b1c662 100644
--- a/src/function/sync/apply-actions/dispatch-child-action/childchangepassword.ts
+++ b/src/function/sync/apply-actions/dispatch-child-action/childchangepassword.ts
@@ -44,7 +44,11 @@ export const dispatchChildChangePassword = async ({ action, childUserId, cache }
 
   await childEntry.save({ transaction: cache.transaction })
 
-  cache.getSecondPasswordHashOfChild.cache.clear()
+  {
+    const clear = cache.getSecondPasswordHashOfChild.cache.clear
+    clear && clear()
+  }
+
   cache.invalidiateUserList = true
   cache.areChangesImportant = true
 }
diff --git a/src/function/sync/apply-actions/dispatch-parent-action/changeparentpassword.ts b/src/function/sync/apply-actions/dispatch-parent-action/changeparentpassword.ts
index 3de0cc9..c329c9b 100644
--- a/src/function/sync/apply-actions/dispatch-parent-action/changeparentpassword.ts
+++ b/src/function/sync/apply-actions/dispatch-parent-action/changeparentpassword.ts
@@ -46,7 +46,11 @@ export async function dispatchChangeParentPassword ({ action, cache }: {
 
   await parentEntry.save({ transaction: cache.transaction })
 
-  cache.getSecondPasswordHashOfParent.cache.clear()
+  {
+    const clear = cache.getSecondPasswordHashOfParent.cache.clear
+    clear && clear()
+  }
+
   cache.invalidiateUserList = true
   cache.areChangesImportant = true
 }
diff --git a/src/function/sync/apply-actions/dispatch-parent-action/setchildpassword.ts b/src/function/sync/apply-actions/dispatch-parent-action/setchildpassword.ts
index da2b000..95cb831 100644
--- a/src/function/sync/apply-actions/dispatch-parent-action/setchildpassword.ts
+++ b/src/function/sync/apply-actions/dispatch-parent-action/setchildpassword.ts
@@ -43,7 +43,11 @@ export async function dispatchSetChildPassword ({ action, cache }: {
 
   await childEntry.save({ transaction: cache.transaction })
 
-  cache.getSecondPasswordHashOfChild.cache.clear()
+  {
+    const clear = cache.getSecondPasswordHashOfChild.cache.clear
+    clear && clear()
+  }
+
   cache.invalidiateUserList = true
   cache.areChangesImportant = true
 }