there were some weird artifacts in the db

CHANGELOG

@@ -5,6 +5,7 @@ minerva (16.0.5) stable; urgency=medium
     consuming (#1605)
   * Bug fix (performance): showing data overlay on big map was time consuming
   * Bug fix: invalid SBML file could crash map upload/format conversion (#1611)
+  * Bug fix: some old maps could not be removed (#1607)
 
  -- Piotr Gawron <piotr.gawron@uni.lu>  Mon, 13 Dec 2021 15:00:00 +0200
 

persist/src/main/resources/db/migration/hsql/16.0.5/V16.0.5.20211215.2__invalid_modification_residue.sql

+update modification_residue_table set modification_type='MODIFICATION_SITE' where modification_type ='';

persist/src/main/resources/db/migration/postgres/16.0.5/V16.0.5.20211215.2__invalid_modification_residue.sql

+update modification_residue_table set modification_type='MODIFICATION_SITE' where modification_type ='';