This patchfile is confused as to what version it applies to. Now corrected.

sql/patch_55_56_a.sql

-# patch_56_57_a.sql
+# patch_55_56_a.sql
 #
 # title: update schema version
 #
 # description:
-# Update schema_version in meta table to 57
+# Update schema_version in meta table to 56
 
-UPDATE meta SET meta_value='57' WHERE meta_key='schema_version';
+UPDATE meta SET meta_value='56' WHERE meta_key='schema_version';
 
 # patch identifier
-INSERT INTO meta (species_id, meta_key, meta_value) VALUES (NULL, 'patch', 'patch_56_57_a.sql|schema_version');
+INSERT INTO meta (species_id, meta_key, meta_value) VALUES (NULL, 'patch', 'patch_55_56_a.sql|schema_version');