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[Ihar Hrachyshka <1623041@xxxxxxxxxxxxxxxxxx>]

It's not neutron issue, it's cisco issue. Changed the project affected.

** Project changed: neutron => networking-cisco

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https://bugs.launchpad.net/bugs/1623041

Title:
  cisco plugin db migration fails due to unknown constraint

Status in networking-cisco:
  In Progress

Bug description:
  when using cisco networking plugin in liberty and later versions
  neutron-db-manage fails for non-innodb engines. This happens due to
  relying on autogenerated name for foreign key in cisco_router_mappings
  table. In InnoDB it is 'cisco_router_mappings_ibfk_2' - the same name
  is used in plugin upgrade() to delete this constraint. Corresponding
  file in Cisco plugin is
  networking_cisco/db/migration/alembic_migrations/versions/liberty/contract/53f08de0523f_neutron_routers_in_cisco_devices.py

  To fix the issue the key must be explicitly named for all other
  database backends.

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