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 ('917dbe53e3e57c4af6b4d0274c3f72b8', -1, 1548199844, 1548199844, '36535d55', -8, 0, 0)

Line : 187
File : sessions.php