diff --git a/app/src/main/java/com/hotdeal/alarm/presentation/main/MainViewModel.kt b/app/src/main/java/com/hotdeal/alarm/presentation/main/MainViewModel.kt
index cba5f56..186eb7d 100644
--- a/app/src/main/java/com/hotdeal/alarm/presentation/main/MainViewModel.kt
+++ b/app/src/main/java/com/hotdeal/alarm/presentation/main/MainViewModel.kt
@@ -48,19 +48,23 @@ class MainViewModel @Inject constructor(
     
     private suspend fun initializeDefaultSiteConfigs() {
         val existingConfigs = siteConfigDao.getAllConfigs()
-        if (existingConfigs.isEmpty()) {
-            val defaultConfigs = SiteType.entries.flatMap { site ->
-                site.boards.map { board ->
-                    SiteConfigEntity(
-                        siteBoardKey = "${site.name}_${board.id}",
-                        siteName = site.name,
-                        boardName = board.id,
-                        displayName = "${site.displayName} - ${board.displayName}",
-                        isEnabled = false
-                    )
-                }
+        val existingKeys = existingConfigs.map { it.siteBoardKey }.toSet()
+
+        val allDefaultConfigs = SiteType.entries.flatMap { site ->
+            site.boards.map { board ->
+                SiteConfigEntity(
+                    siteBoardKey = "${site.name}_${board.id}",
+                    siteName = site.name,
+                    boardName = board.id,
+                    displayName = "${site.displayName} - ${board.displayName}",
+                    isEnabled = false
+                )
             }
-            siteConfigDao.insertConfigs(defaultConfigs)
+        }
+
+        val missingConfigs = allDefaultConfigs.filter { it.siteBoardKey !in existingKeys }
+        if (missingConfigs.isNotEmpty()) {
+            siteConfigDao.insertConfigs(missingConfigs)
         }
     }