diff --git a/backend/service/feed/feedFunctions.go b/backend/service/feed/feedFunctions.go
index 3d2eb0f..894f322 100644
--- a/backend/service/feed/feedFunctions.go
+++ b/backend/service/feed/feedFunctions.go
@@ -45,7 +45,7 @@ func ClearFeeds(db *daos.Dao, months int, clock localTime.Clock) {
 			sqlResult, err = db.DB().Delete("feeds", dbx.NewExp("id = {:id}", dbx.Params{"id": feed.GetId()})).Execute()
 			if err != nil {
 				slog.Error("CleanFeeds: delete feed "+feed.GetId()+" failed", "error", err)
-				slog.Error("SQL Result: ", sqlResult)
+				slog.Error("SQL Result: ", "error", sqlResult)
 			} else {
 				slog.Info("CleanFeeds: delete feed " + feed.GetId() + " successful")
 			}
diff --git a/backend/service/fetch/sport/sportFetcher.go b/backend/service/fetch/sport/sportFetcher.go
index fe79d8d..b885d57 100644
--- a/backend/service/fetch/sport/sportFetcher.go
+++ b/backend/service/fetch/sport/sportFetcher.go
@@ -233,9 +233,10 @@ func getWeekEvents(start time.Time, end time.Time, cycle string) ([]time.Time, [
 			endI, endIErr = getDayInt(days[1])
 
 			if endIErr != nil || startIErr != nil {
-				slog.Error("Error while getting day int: "+days[0]+" - "+days[1]+" :", startIErr, endIErr)
+				slog.Error("Error while getting day int: "+days[0]+" - "+days[1]+" :", "error", startIErr)
+				slog.Error("Error while getting day int endErr: ", "error", endIErr)
 			} else {
-				//create a int array with all days from start to end day
+				//create an int array with all days from start to end day
 				var daysBetween []int
 				for i := startI; i <= endI; i++ {
 					daysBetween = append(daysBetween, i)
@@ -442,7 +443,7 @@ func htmlRequest(url string) (*goquery.Document, error) {
 	defer func(Body io.ReadCloser) {
 		readErr := Body.Close()
 		if readErr != nil {
-			slog.Error("Error while closing response body from html request", readErr)
+			slog.Error("Error while closing response body from html request", "error", readErr)
 			return
 		}
 	}(resp.Body)
diff --git a/backend/service/fetch/v1/fetchSeminarGroupService.go b/backend/service/fetch/v1/fetchSeminarGroupService.go
index 0821449..dc0fb58 100644
--- a/backend/service/fetch/v1/fetchSeminarGroupService.go
+++ b/backend/service/fetch/v1/fetchSeminarGroupService.go
@@ -81,14 +81,14 @@ func FetchSeminarGroups(app *pocketbase.PocketBase) ([]*models.Record, error) {
 
 	collection, dbError := db.FindCollection(app, "groups")
 	if dbError != nil {
-		slog.Error("Error while searching collection groups", dbError)
+		slog.Error("Error while searching collection groups", "error", dbError)
 		return nil, err
 	}
 	var insertedGroups []*models.Record
 
 	insertedGroups, dbError = db.SaveGroups(groups, collection, app)
 	if dbError != nil {
-		slog.Error("Error while saving groups", dbError)
+		slog.Error("Error while saving groups", "error", dbError)
 		return nil, err
 	}