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 ('584bf2340d8e775695842d78056aad8b', -1, 1475088201, 1475088201, '36a0bba0', -1, 0, 0)

Line : 187
File : sessions.php