Error when starting MySQL server

[sscrewston]

Traceback (most recent call last):
  File "peewee.py", line 3144, in execute_sql
sqlite3.IntegrityError: UNIQUE constraint failed: team.team_id

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "nba_sql.py", line 389, in <module>
  File "gooey\python_bindings\gooey_decorator.py", line 134, in <lambda>
  File "nba_sql.py", line 128, in main
  File "general_requester.py", line 51, in populate
  File "db_utils.py", line 16, in insert_many
  File "db_utils.py", line 30, in __insert_many_sqlite
  File "peewee.py", line 1907, in inner
  File "peewee.py", line 1978, in execute
  File "peewee.py", line 2745, in _execute
  File "peewee.py", line 2474, in _execute
  File "peewee.py", line 3157, in execute
  File "peewee.py", line 3151, in execute_sql
  File "peewee.py", line 2917, in __exit__
  File "peewee.py", line 190, in reraise
  File "peewee.py", line 3144, in execute_sql
peewee.IntegrityError: UNIQUE constraint failed: team.team_id