Sending lots of messages with a "#" causes errors

Steps to reproduce:

1. go to a room on mw

2. spam lots of messages with a "#" (a mw hastag)

3. ?????

4. PROFIT

BUSY Error database is locked (5) on query CREATE TABLE mwtag (id INTEGER PRIMARY KEY AUTOINCREMENT, user text, tag text, added text, line text )

Why does it try and create the table mwtag? Shouldn't it just check to see if it exists and if it does then just UPSERT or something.