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 ('17a9b2f2c4bd85cfbf71a1ab34a34ec4', -1, 1511342076, 1511342076, '3691753c', -9, 0, 0)

Line : 187
File : sessions.php