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 ('9c3bba9d63f49de3d2d2a9094858bc6d', -1, 1542447380, 1542447380, '369f2c36', 5, 0, 0)

Line : 186
File : sessions.php