How to delete rulset entrypoint


I tried to use the API to create entrypoint rulsets (exception to manage rules on WAFV2). It worked, but I know get an error

exceeded maximum number of zone rulesets for phase 'http_request_firewall_managed

Even though there are no rules, the entrypoint still exists. However; there does not seem to be any documentation on how to delete the entrypoint. Nothing appears in the console. Is there any way to delete it ?