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 ('566e10d76ff931a5d61d1564d7c58fb8', -1, 1550316023, 1550316023, '36eb37fd', 19, 0, 0)

Line : 186
File : sessions.php