[MIRROR] Fixes a race condition in mutations code [MDB IGNORE] (#718) #1809

Job	Run time
Run Linters	2m 7s
Collect data for other tasks	13s
Compile Maps	4m 20s
Windows Build	2m 24s
Integration Tests (birdshot) / run_integration_tests	10m 41s
Integration Tests (blueshift) / run_integration_tests	12m 10s
Integration Tests (deltastation) / run_integration_tests	11m 13s
Integration Tests (gateway_test) / run_integration_tests	12m 16s
Integration Tests (icebox) / run_integration_tests	11m 15s
Integration Tests (kilostation2) / run_integration_tests	11m 15s
Integration Tests (metastation) / run_integration_tests	10m 30s
Integration Tests (multiz_debug) / run_integration_tests	10m 20s
Integration Tests (runtimestation) / run_integration_tests	10m 7s
Integration Tests (northstar) / run_integration_tests	11m 19s
Integration Tests (nssjourney) / run_integration_tests	10m 59s
Integration Tests (tramstation) / run_integration_tests	11m 17s
Integration Tests (voidraptor) / run_integration_tests	11m 9s
Alternate Tests (515, 1603, runtimestation) / run_integration_tests	9m 44s
Check Alternate Tests	1s
Compare Screenshot Tests	1m 35s
	2h 44m 55s

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