I have a custom field set up that incrementally increases the value every time an issue bounces from QA back to a status called changes requested.
{{#increment}}{{issue.Bounce_Per_Sprint}}{{/}}
So that works. What I want to do is clear that value or set it to 0 for any issues that carry over into the next sprint. I've tried variations of {{clear}}, set, "0", null, and I don't even remember what else at this point. I've also tried setting the default value to 0 and referencing that. I keep getting this error:

Please help!! Thank you