fix: ensure json is not None

[eschutho]

Fixing a migration

SUMMARY

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #24280 (0e5995f) into master (c5ea40f) will not change coverage.
The diff coverage is n/a.

❗ Current head 0e5995f differs from pull request most recent head f650221. Consider uploading reports for the commit f650221 to get more accurate results

@@           Coverage Diff           @@
##           master   #24280   +/-   ##
=======================================
  Coverage   68.31%   68.31%           
=======================================
  Files        1957     1957           
  Lines       75624    75624           
  Branches     8223     8223           
=======================================
  Hits        51664    51664           
  Misses      21852    21852           
  Partials     2108     2108           

Flag	Coverage Δ
hive	53.39% <ø> (ø)
mysql	78.92% <ø> (ø)
postgres	79.00% <ø> (ø)
presto	53.32% <ø> (ø)
python	82.82% <ø> (ø)
sqlite	77.53% <ø> (ø)
unit	53.44% <ø> (ø)

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[sadpandajoe]

🏷️ preset:2023.21