Hello,
I needed to change a custom field type and updated the customfield table with a new type:
UPDATE customfield SET CUSTOMFIELDTYPEKEY = 'com.atlassian.jira.plugin.sysme', CUSTOMFIELDSEARCHERKEY = 'com.atlassian.jira.plugin.system.customfieldtypes:multiselectsearcher' WHERE cfname = '%SOMENAME%'
Now after I log in into Jira I get 500 Invalid module key specified.
It is very urgent as this is a production Jira and I don t have any database backups.