Can't enter any Stories into the system, can't edit anything!!!!!
I've luckily been able to resolve this by hitting the Restore defaults option in the Admin - Issues- Field Configuration window.
But have no idea how this happenned,
Epic Name is a LOCKED field, this morning suddenly everyone started dropping me mail, calling, IM "I can't enter a new story, Epic Name required".
I found Epic Name in Field Config, and yes it said REQUIRED LOCKED, but I couldn't change it!
I only use the default Field Configuration, and as I see it there is no way to set it to REQUIRED. I can set other fields to required but this field is locked. I called Atlassian but only got a machine, I couldn't talk to anyone, so logged an Issue, but have not heard back....I really don't want this to happen again.