I think your facility is trying to fulfill two needs. You need a position and they need a nurse. Will you get an adequate orientation? Psych patients can get physical, is it a multiple diagnosis unit? Your physical safety could still be in jeopardy. No hospital can guarantee you won’t be placed in a situation that could cause additional injury. I agree this is not a license issue. Its a training one and if you do accept without establishing competence, that could hurt you. Is changing specialty an issue or is it the shift or both?
At least they’re trying to keep you in the system, even if the job “sucks”. You won’t get far grieving, unless they are holding back on other vacant positions in the facility.