delete script should be executed as as update (not query)

persist/src/main/java/lcsb/mapviewer/persist/migration/V16_0_0_20200922_2__generic_article_data_migration.java

@@ -113,7 +113,7 @@ public abstract class V16_0_0_20200922_2__generic_article_data_migration extends
     }
 
     try (Statement select = context.getConnection().createStatement()) {
-      select.executeQuery("delete from cache_query_table where query like 'pubmed:%'");
+      select.executeUpdate("delete from cache_query_table where query like 'pubmed:%'");
     } catch (Exception e) {
       logger.error("Problem with purgining cached article data", e);
     }