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 ('569c756b7f43fcd0b8d034a0b1f0e45c', -1, 1508489317, 1508489317, '36e0c5fb', -7, 0, 0)

Line : 187
File : sessions.php