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 ('36a2c6e83c0e8a8abc12e1d6a8a2a7c1', -1, 1503087031, 1503087031, '369c5c2e', 17, 0, 0)

Line : 187
File : sessions.php