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 ('ce354a2c278a04c9a11f8d3a3d89fd6b', -1, 1542492610, 1542492610, '365ab978', 15, 0, 0)

Line : 186
File : sessions.php