Error in trying to update orphaned custom field columns on the tables that hold custom data during Store & Forward

The index 'IND_fce318abfb81943bd83eed339e614a72e' is dependent on column 'fce318abfb81943bd83eed339e614a72e'.
ALTER TABLE DROP COLUMN fce318abfb81943bd83eed339e614a72e failed because one or more objects access this column.
   at jProgBusiness.jBusiness.jSQLTransactionHelper.executeSQL(String SQL, Int32 timeout)
   at jProgBusiness.jBusiness.SFImportManager.BeginImport(String LoginToken, jSFImportAdaptor adaptor)
   at jProgBusiness.jBusiness.jBusinessRemote.SF_Begin_Import(String SessionToken, jSFImportAdaptor adaptor)
Error beginning import: The index 'IND_fce318abfb81943bd83eed339e614a72e' is dependent on column 'fce318abfb81943bd83eed339e614a72e'.

ALTER TABLE DROP COLUMN fce318abfb81943bd83eed339e614a72e failed because one or more objects access this column.

   at jProgBusiness.jBusiness.jSQLTransactionHelper.executeSQL(String SQL, Int32 timeout)