Necessary not to set version to accession. The former should be integer and...

Necessary not to set version to accession. The former should be integer and the latter is an alphanumerical string.
Newest MySQL version enforce the constraint and raise error 1366 (invalid integer value).
If the entry does not have a version, it will automatically default to 0.

misc-scripts/xref_mapping/XrefParser/UniProtParser.pm

@@ -554,7 +554,6 @@ sub create_xrefs {
 	      $dep2{LABEL} = $protein_id;
 	      my ($prot_acc, $prot_version) = $protein_id =~ /([^.]+)\.([^.]+)/;
 	      $dep2{ACCESSION} = $prot_acc;
-	      $dep2{VERSION} = $prot_acc;
 	      $dependent_xrefs{ $dep2{SOURCE_NAME} }++; # get count of dependent xrefs.
 	      $seen{$source.":".$protein_id} = 1;
 	      push @{$xref->{DEPENDENT_XREFS}}, \%dep2; # array of hashrefs