I added a new ship to the ships.tbl in the mod I was working on, but it turns out I had set the "player_ship" flag incorrectly (forgot the underscore

) so I went into FRED to edit a mission, and I changed the ship type of the player ship from the menu into the new type, but it said something like "not a valid player ship type, resetting ship to non-player ship". So I went back and fixed the table, but now FRED still says "incorrect number of player ships". I tried opening the ship in the ship editor and clicking "set as player ship" but it doesn't seem to have done anything and I keep getting the error. Help please?