Bug/Issue Invincible-Nohirable Npc in ship

Hello , so after copy/past the shipworld from a character to another , i've notice i've forget to dismiss the crew members...so now i've NPC in my ship and i can't get rid of them...

Things i've tried :
-kill them (lava and others) didnt work , infinite life.
-hire them (with contract from joboffers mod) they don't understand what i want so didnt work.
-speak to them , they only say something like "stay close to me for stay safe"
-check crew memeber list at SAIL , they aren't listed.


So i've some questions :
-can we have a mod for make killable NPC in the ship ?
-can we have a command for remove a NOC ? (not for kill , it wouldnt work in this case)
-if i spawn an hostille NPC , did the friendly would die from him ?


Sorry for my english.