[tomasol]

Great questions. If you are fixing a bug in a workflow, which has running executions, there are two scenarios:

Either the fix does not break the determinism, meaning the the execution did not hit the fix yet. In this case the execution can be replayed and continue on the patched WASM component.

Otherwise, the execution replay causes "Non determinism detected" error. In this case you need to handle the situation manually. Since the execution log is in a sqlite file, you can select all execution affected by the bug and perform a custom cleanup. Also you can create a "forked" execution just by copying the execution log + child responses into a new execution, however there is no API for it yet.

> Can I update the workflow while it has running instances without interfering the running instances?

If you mean keep the in-progress executions on the old version of the code, you can do that by introducing a new version in the WIT file and/or change the new function name.