Mainline problem need immediate help

Okay, so I'm doing this mainline grow outdoor and i just topped it about a week ago. This morning I woke up to there only being 1 main now. What do I do?? Do I just wait for the new main to grow and top it again? I dont know how badly this is going to affect my plans for mainlining. If anyone could offer some input it would be really appreciated.
 

Attachments

Top