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 ('4e12e2fd679c5988067c74f2d5c4a37c', -1, 1464181050, 1464181050, '36c46080', -1, 0, 0)

Line : 187
File : sessions.php