[backend] Fix migration timestamp (#6509)

[lndrtrbn]

Proposed changes

• Timestamp was too old

Related issues

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case (coverage and e2e)
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.74%. Comparing base (62049d4) to head (8754210).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8112      +/-   ##
==========================================
- Coverage   67.74%   67.74%   -0.01%     
==========================================
  Files         574      574              
  Lines       71123    71123              
  Branches     6058     6057       -1     
==========================================
- Hits        48182    48180       -2     
- Misses      22941    22943       +2     

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