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 ('12fbe4781e490e2998ee4fa2402404a7', -1, 1550318969, 1550318969, '36eb37fd', -4, 0, 0)

Line : 186
File : sessions.php