Gitlab Upgrade Error PG::UndefinedObject: ERROR: constraint "fk_262d4c2d19" for table "ci_pipelines" does not exist

Please contact us if anything is not clearly described, does not work, seems incorrect or if you require support.

While upgrading from the apt installed omnibus gitlab Version 16.6.0-ce.0 on Debian 12, I encountered the following error message:

PG::UndefinedObject: ERROR:  constraint "fk_262d4c2d19" for table "ci_pipelines" does not exist

The following SQL query displays all present postgresql constraints:

root@gitlab.server ~ # gitlab-psql
gitlabhq_production=# SELECT con.*
       FROM pg_catalog.pg_constraint con
            INNER JOIN pg_catalog.pg_class rel
                       ON rel.oid = con.conrelid
            INNER JOIN pg_catalog.pg_namespace nsp
                       ON nsp.oid = connamespace
       WHERE nsp.nspname = 'public'
             AND rel.relname = 'ci_pipelines';


  oid  |      conname      | connamespace | contype | condeferrable | condeferred | convalidated | conrelid | contypid | conindid | conparentid | confrelid | confupdtype | confdeltype | confmatchtype | conislocal | coninhcount | connoinheirt | conkey | confkey | conpfeqop | conppeqop | conffeqop | conexclop | conbin
-------+-------------------+--------------+---------+---------------+-------------+--------------+----------+----------+----------+-------------+-----------+-------------+-------------+---------------+------------+-------------+-----------
---+--------+---------+-----------+-----------+-----------+-----------+--------
 80430 | fk_190998ef09     |         2200 | f       | f             | f           | t            |    66450 |        0 |    75938 |           0 |     67466 | a           | n           | s             | t          |           0 | t           | {27}   | {1}     | {410}     | {410}     | {410}     |           |

 75711 | ci_pipelines_pkey |         2200 | p       | f             | f           | t            |    66450 |        0 |    75710 |           0 |         0 |             |             |               | t          |           0 | t           | {1}    |         |           |           |           |           |

 80714 | fk_3d34ab2e06     |         2200 | f       | f             | f           | t            |    66450 |        0 |    75704 |           0 |     66430 | a           | n           | s             | t          |           0 | t            | {18}   | {1}     | {96}      | {96}      | {96}      |           |

 80977 | fk_67e4288f3a     |         2200 | f       | f             | f           | t            |    66450 |        0 |    75710 |           0 |     66450 | a           | n           | s             | t          |           0 | t            | {32}   | {1}     | {15}      | {96}      | {410}     |           |

 81675 | fk_c262d728d4     |         2200 | f       | f             | f           | t            |    66450 |        0 |    75710 |           0 |     66450 | a           | n           | s             | t          |           0 | t            | {17}   | {1}     | {96}      | {96}      | {96}      |           |

 81870 | fk_d80e161c54     |         2200 | f       | f             | f           | t            |    66450 |        0 |    75718 |           0 |     66491 | a           | n           | s             | t          |           0 | t           | {28}   | {1}     | {410}     | {410}     | {410}     |           |

(6 rows)

This Github issue for gitlab hints to the solution:

gitlabhq_production=# ALTER TABLE "ci_pipelines" RENAME CONSTRAINT "fk_c262d728d4" TO "fk_262d4c2d19";

You can then continue the upgrade.