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 ('d139b32a3d26dd848467c2b9e8e7c0d6', -1, 1537687154, 1537687154, '369e34a6', 4, 0, 0)

Line : 187
File : sessions.php