[Fixes #12591] Migration documents.0037_delete_documentresourcelink may fail

[etj]

See #12591

Checklist

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 64.26%. Comparing base (5bcbd82) to head (cd9d3d1).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #12592 +/- ## ========================================== - Coverage 64.26% 64.26% -0.01% ========================================== Files 888 888 Lines 53619 53619 Branches 6608 6608 ========================================== - Hits 34458 34457 -1 - Misses 17646 17649 +3 + Partials 1515 1513 -2 ```