phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('f0ae3a1c83db97e6ad7a9d05f34a0d1f', -1, 1422209793, 1422209793, '36a67a5c', -1, 0, 0)

Line : 187
File : sessions.php