Neutron DB upgrade failure.

"Cannot change column 'ipsec_site_conn_id': used in a foreign key constraint 'cisco_csr_identifier_map_ibfk_1'") [SQL: u'ALTER TABLE cisco_csr_identifier_map MODIFY ipsec_site_conn_id VARCHAR(36) NULL']

The upgrade sql can’t run because of a relation.

 

Remove the relationship on the ipsec_site_conn_id column.   Reduce the varchar from 64 to 32.  Re-create the relationship.