fix: value should not be changed after doc is submitted (backport #2561)

[mergify]

Support Reference: https://support.frappe.io/helpdesk/tickets/20782

_{Huly®: IC-2679}

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This is an automatic backport of pull request #2561 done by Mergify.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.80%. Comparing base (2ad87c9) to head (2bcd11b).
Report is 16 commits behind head on version-15-hotfix.

Additional details and impacted files

@@                Coverage Diff                 @@
##           version-15-hotfix    #2567   +/-   ##
==================================================
  Coverage              59.80%   59.80%           
==================================================
  Files                    120      120           
  Lines                  11567    11567           
==================================================
  Hits                    6918     6918           
  Misses                  4649     4649           

Files with missing lines	Coverage Δ
...ia_compliance/gst_india/constants/custom_fields.py	100.00% <ø> (ø)

[india-compliance-bot]

🎉 This issue has been resolved in version 15.13.2 🎉

The release is available on GitHub release

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