Mandatory field when edit/update issue when it shouldnt

[Rob B]

When I go to edit/update an issue it makes a few fields mandatory. There is no Field Configuration for this Issue Type and i cant find any behaviours mapped to this issue type either. logs below....

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2022-10-12 10:52:12,002 http-nio-8080-exec-11 ERROR N455065 652x52417x2 1p42irq 10.44.161.94 /rest/scriptrunner/behaviours/latest/runvalidator.json [c.o.jira.behaviours.BehaviourManagerImpl] Script function failed on issue: issue: WHCOMSERV-11761308, user: N455065, fieldId: customfield_16900, file: <inline script>
org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '' with class 'java.lang.String' to class 'java.util.Date'
	at 9666ee421ed8d5cd0d3bbb2c29c33a17.run(9666ee421ed8d5cd0d3bbb2c29c33a17.groovy:6)
	at com.onresolve.jira.behaviours.BehaviourManagerImpl$_runValidator_closure2.doCall(BehaviourManagerImpl.groovy:194)
	at com.onresolve.jira.behaviours.BehaviourManagerImpl.runValidator(BehaviourManagerImpl.groovy:141)
	at com.onresolve.jira.behaviours.BehaviourManagerImpl.runValidator(BehaviourManagerImpl.groovy:91)
	at com.onresolve.jira.behaviours.restservice.BehavioursEndpoint$_runValidator_closure3.doCall(BehavioursEndpoint.groovy:137)
	at com.onresolve.jira.behaviours.restservice.BehavioursEndpoint$_runValidator_closure3.doCall(BehavioursEndpoint.groovy)
	at com.sun.proxy.$Proxy3604.get(Unknown Source)
	at com.onresolve.jira.behaviours.restservice.BehavioursEndpoint.withServletThreadLocal(BehavioursEndpoint.groovy:218)
	at com.onresolve.jira.behaviours.restservice.BehavioursEndpoint.runValidator(BehavioursEndpoint.groovy:131)
	... 19 filtered
	at com.atlassian.plugins.rest.module.RestDelegatingServletFilter$JerseyOsgiServletContainer.doFilter(RestDelegatingServletFilter.java:154)
	... 1 filtered
	at com.atlassian.plugins.rest.module.RestDelegatingServletFilter.doFilter(RestDelegatingServletFilter.java:68)
	... 32 filtered
	at com.atlassian.servicedesk.internal.web.ExternalCustomerLockoutFilter.doFilter(ExternalCustomerLockoutFilter.java:56)
	... 8 filtered
	at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
	... 53 filtered
	at com.atlassian.jira.security.JiraSecurityFilter.lambda$doFilter$0(JiraSecurityFilter.java:66)
	... 1 filtered
	at com.atlassian.jira.security.JiraSecurityFilter.doFilter(JiraSecurityFilter.java:64)
	... 16 filtered
	at com.atlassian.plugins.rest.module.servlet.RestSeraphFilter.doFilter(RestSeraphFilter.java:37)
	... 19 filtered
	at com.atlassian.jira.servermetrics.CorrelationIdPopulatorFilter.doFilter(CorrelationIdPopulatorFilter.java:30)
	... 5 filtered
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter.lambda$invokeFilterChain$0(CustomerContextSettingFilter.java:181)
	at com.atlassian.servicedesk.internal.api.util.context.ReentrantThreadLocalBasedCodeContext.rteInvoke(ReentrantThreadLocalBasedCodeContext.java:137)
	at com.atlassian.servicedesk.internal.api.util.context.ReentrantThreadLocalBasedCodeContext.runOutOfContext(ReentrantThreadLocalBasedCodeContext.java:90)
	at com.atlassian.servicedesk.internal.utils.context.CustomerContextServiceImpl.runOutOfCustomerContext(CustomerContextServiceImpl.java:47)
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter.outOfCustomerContext(CustomerContextSettingFilter.java:174)
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter.doFilterImpl(CustomerContextSettingFilter.java:130)
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter.doFilter(CustomerContextSettingFilter.java:121)
	... 4 filtered
	at com.atlassian.jwt.internal.servlet.JwtAuthFilter.doFilter(JwtAuthFilter.java:32)
	... 3 filtered
	at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
	... 4 filtered
	at com.atlassian.web.servlet.plugin.LocationCleanerFilter.doFilter(LocationCleanerFilter.java:36)
	... 26 filtered
	at com.atlassian.jira.servermetrics.MetricsCollectorFilter.doFilter(MetricsCollectorFilter.java:25)
	... 24 filtered
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

[Nic Brough -Adaptavist-]

The error you are getting is definitely coming from a Behaviour, so there must be one somewhere, associated with the issue type or project.

Try the built-in script "script registry" to get a list of all the behaviours (and other scripts) configured in your system.  That might help you identify it.