[aldy505]

SaaS is running 26.8 now. See getsentry/snuba#8646

Closes #4611

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[aminvakil]

<allow_nullable_key>1</allow_nullable_key> should be moved under <merge_tree> section.

https://clickhouse.com/docs/reference/settings/merge-tree-settings:

MergeTree settings can be set in the merge_tree section of the server config file, or specified for each MergeTree table individually in the SETTINGS clause of the CREATE TABLE statement.

https://clickhouse.com/docs/reference/settings/merge-tree-settings/allow#allow_nullable_key

ClickHouse/ClickHouse#100332 this is the PR which prevents and The server now refuses to start (and rejects SYSTEM RELOAD CONFIG) when the server config contains an unknown top-level element, instead of silently ignoring it.

[github-actions]

Coverage Results 📊

✅ 22 passed | Total: 22 | Pass Rate: 100% | Execution Time: 10m 45s

📊 Comparison with Base Branch

Metric	Change
Total Tests	—
Passed Tests	—
Failed Tests	—
Skipped Tests	—

✨ Test counts unchanged from base.

All tests are passing successfully.

✅ Patch coverage is 100.00% (no changed executable lines found; target 50%).
Project statement coverage is 95.58% (unchanged from base (3f62007) to head (5ed89cd)).

Coverage diff

@@            Coverage Diff             @@
##        master     #4614       +/-##
==========================================
  Coverage    95.58%    95.58%        —%
==========================================
  Files            5         5         —
  Tracked lines       339       339         —
  Branches         0         0         —
==========================================
  Hits           324       324         —
  Misses          15        15         —
  Partials         0         0         —

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