fix LockedPartitions without session

[nshestakov]

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[github-actions]

⚪ 2024-08-13 16:22:59 UTC Pre-commit check for 49a55cc has started.
⚪ 2024-08-13 16:25:52 UTC Build linux-x86_64-release-clang14 is running...
🟢 2024-08-13 16:31:26 UTC Build successful.

[github-actions]

⚪ 2024-08-13 16:31:49 UTC Pre-commit check for 49a55cc has started.
⚪ 2024-08-13 16:34:43 UTC Build linux-x86_64-relwithdebinfo is running...
🟢 2024-08-13 17:14:21 UTC Build successful.
⚪ 2024-08-13 17:14:40 UTC Tests are running...
🔴 2024-08-13 18:42:27 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
14115	12800	0	4	1302	9

🟢 2024-08-13 18:43:02 UTC ydbd size 8.1 GiB changed* by +1.2 KiB, which is < 100.0 KiB vs stable-24-3: OK

ydbd size dash	stable-24-3: ef7e2a9	merge: 49a55cc	diff	diff %
ydbd size	8 723 918 816 Bytes	8 723 920 080 Bytes	+1.2 KiB	+0.000%
ydbd stripped size	476 913 096 Bytes	476 913 224 Bytes	+128 Bytes	+0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2024-08-13 16:34:38 UTC Pre-commit check for 49a55cc has started.
⚪ 2024-08-13 16:37:40 UTC Build linux-x86_64-release-asan is running...
🟢 2024-08-13 16:59:53 UTC Build successful.
⚪ 2024-08-13 17:00:07 UTC Tests are running...
🔴 2024-08-13 18:49:15 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
9817	9772	0	9	24	12

🟢 2024-08-13 18:49:45 UTC ydbd size 5.5 GiB changed* by +736 Bytes, which is < 100.0 KiB vs stable-24-3: OK

ydbd size dash	stable-24-3: ef7e2a9	merge: 49a55cc	diff	diff %
ydbd size	5 904 400 888 Bytes	5 904 401 624 Bytes	+736 Bytes	+0.000%
ydbd stripped size	1 480 270 208 Bytes	1 480 270 336 Bytes	+128 Bytes	+0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}