I think you have a field called “own fault, other’s fault/own fault, other’s fault" and there is a validator or mandatory-field flag telling Jira that the field needs to be filled. And when you try to "weir out" an issue, you are not filling it in, so Jira is preventing it.
(I do not thing "weir out" has translated well, I do not know what it means. I would guess at "close", which would mean that your problem is a validator on the "close issue" transition demanding a field you are not filling in, but I cannot be sure)
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