fix: avoid "string" in None condition

[barredterra]

Close #29032

[barredterra]

@Mergifyio backport version-13-hotfix version-12-hotfix

[mergify]

backport version-13-hotfix version-12-hotfix

🟠 Waiting for conditions to match

• merged [:pushpin: backport requirement]

[codecov]

Codecov Report

Merging #29033 (52397c9) into develop (cfb6b26) will decrease coverage by 5.05%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop   #29033      +/-   ##
===========================================
- Coverage    55.57%   50.51%   -5.06%     
===========================================
  Files         1128     1128              
  Lines        67295    67295              
===========================================
- Hits         37401    33996    -3405     
- Misses       29894    33299    +3405     

Impacted Files	Coverage Δ
erpnext/regional/france/utils.py	0.00% <0.00%> (-100.00%)	⬇️
erpnext/hr/doctype/driver/driver.py	0.00% <0.00%> (-100.00%)	⬇️
erpnext/accounts/doctype/pos_field/pos_field.py	0.00% <0.00%> (-100.00%)	⬇️
erpnext/support/doctype/issue_type/issue_type.py	0.00% <0.00%> (-100.00%)	⬇️
...rpnext/hr/doctype/grievance_type/grievance_type.py	0.00% <0.00%> (-100.00%)	⬇️
...ext/stock/doctype/pick_list_item/pick_list_item.py	0.00% <0.00%> (-100.00%)	⬇️
.../accounts/doctype/budget_account/budget_account.py	0.00% <0.00%> (-100.00%)	⬇️
...ock/doctype/delivery_settings/delivery_settings.py	0.00% <0.00%> (-100.00%)	⬇️
...iving_license_category/driving_license_category.py	0.00% <0.00%> (-100.00%)	⬇️
...ions/doctype/mpesa_settings/mpesa_custom_fields.py	0.00% <0.00%> (-100.00%)	⬇️
... and 127 more

[mergify]

backport version-13-hotfix version-12-hotfix

✅ Backports have been created

• #29034 fix: avoid "string" in None condition (backport #29033) has been created for branch version-13-hotfix
• #29035 fix: avoid "string" in None condition (backport #29033) has been created for branch version-12-hotfix