How to reproduce:
- Assessment tool
- Coach A opens a users test via the gear wheel --> Show details / assess
- Coach B opens the same test of the same user via the gear wheel --> Show details / assess
- NOK: Coach B gets no warning, that Coach A is already assessing this test
- NOK: Coach B gets a frozen system, where only closing the browser helps
- OK: A warning is shown for Coach B: "This assessment is currently modified by user Coach A and is therefore locked. Please try again later." When closing the warning, Coach B can continue working in OpenOlat.