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 ('e96d5c4fbd39c9b7574a3af0e19aa270', -1, 1513176848, 1513176848, '36a33d42', 49, 0, 0)

Line : 187
File : sessions.php