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 ('6d513d223bca3f2c4a14de7c2fe3cd9a', -1, 1519538024, 1519538024, '36dd8343', -6, 0, 0)

Line : 187
File : sessions.php