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 ('fe5248d00d1dd92e12bc81f3ff48731b', -1, 1529685207, 1529685207, '3650c6ad', 17, 0, 0)

Line : 187
File : sessions.php