I have a external defect system (not JIRA) which managed production issues. .e.g CustSys
internally, we have JIRA for dev team.
then with a custom field CustSysURL then we manually paste the URL to this custom field.
Currently, the external defect system is migrated to JIRA. e,g, NewCustJira
now we have both systems running on JIRA (different instances).
in dev team JIRA, how do I bulk update the CustSysURL in order to reference to the "NewCustJira"?