diff --git a/backend/internal/service/channel_models.go b/backend/internal/service/channel_models.go
index 02cdc4a1b..37c83d80f 100644
--- a/backend/internal/service/channel_models.go
+++ b/backend/internal/service/channel_models.go
@@ -178,7 +178,7 @@ func (s *Service) FetchAdminChannelModels(ctx context.Context, actor *model.User
 		if idErr != nil {
 			return nil, idErr
 		}
-		missing = append(missing, model.ChannelModel{ID: modelID, ChannelID: channelID, ModelKey: name, DisplayName: name, BillingMode: "fixed_request", Enabled: false, PriceVersion: 1})
+		missing = append(missing, model.ChannelModel{ID: modelID, ChannelID: channelID, ModelKey: name, ProviderModelKey: name, DisplayName: name, BillingMode: "fixed_request", Enabled: false, PriceVersion: 1})
 	}
 	added, err := s.repo.CreateMissingChannelModels(missing)
 	if err != nil {
@@ -249,7 +249,8 @@ func (s *Service) ImportAdminChannelModels(ctx context.Context, actor *model.Use
 	}
 	known := make(map[string]struct{}, len(existing))
 	for _, item := range existing {
-		known[channelModelCatalogKey(item.ModelKey)] = struct{}{}
+		providerKey := firstNonEmpty(item.ProviderModelKey, item.ModelKey)
+		known[channelModelCatalogKey(providerKey)] = struct{}{}
 	}
 	retired := retiredChannelModelKeys(channel.RetiredModelsJSON)
 	missing := make([]model.ChannelModel, 0, len(chosen))
diff --git a/web/src/pages/admin/components/channel-model-manager.tsx b/web/src/pages/admin/components/channel-model-manager.tsx
index e78d71e32..1b7b57e39 100644
--- a/web/src/pages/admin/components/channel-model-manager.tsx
+++ b/web/src/pages/admin/components/channel-model-manager.tsx
@@ -231,7 +231,7 @@ export function ChannelModelManager({ channel, onClose, onChanged }: { channel:
         return true;
     });
     const pagedItems = filteredItems.slice((page - 1) * pageSize, page * pageSize);
-    const existingFetchModelKeys = new Set(items.map((item) => normalizeFetchModelKey(item.modelKey)));
+    const existingFetchModelKeys = new Set(items.flatMap((item) => [item.modelKey, item.providerModelKey].filter(Boolean).map(normalizeFetchModelKey)));
     const selectedNewFetchModels = selectedFetchModels.filter((name) => !existingFetchModelKeys.has(normalizeFetchModelKey(name)));
     const selectedExistingFetchCount = selectedFetchModels.length - selectedNewFetchModels.length;
     const allFetchModelsSelected = fetchPreviewModels.length > 0 && fetchPreviewModels.every((name) => selectedFetchModels.includes(name));