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 ('b1e9dc6a89314784c0f8c3fb32008cdd', -1, 1548220577, 1548220577, '12cdf6ee', 10, 0, 0)

Line : 187
File : sessions.php