Locating the records that contain incorrectly formatted controlled vocabulary terms can be accomplished by following the workflow below:
This will generate an XML file containing only the desired metadata values of your records and the associated item IDs. Then import the XML into another program that can isolate all lines containing the term that appears with extra characters preceding it. By doing this, you should be able to locate the record that has the incorrectly formatted value.
With the CONTENTdm number, you can then locate the record in CONTENTdm Admin by using this URL format and replacing the sections in bold with the correct values: https://server#####.contentdm.oclc.org/cgi-bin/admin/edittxt.exe?CISOROOT=/collectionAlias&CISOPTR=CONTENTdmNumber
Save the records and re-index the collection.
For individual collections, you will then delete the current controlled vocabulary for the field and create a new CV:
If you are still unable to remove a term from your controlled vocabulary, please contact OCLC Support.