SQLSTATE[08006] [7] connection to server at "asia-northeast2.864dbc14-b507-44e7-9037-54098441dadb.gcp.ybdb.io" (34.97.213.115), port 5433 failed: FATAL: remaining connection slots are reserved for non-replication superuser connections

Typecho\Db\Adapter\ConnectionException: SQLSTATE[08006] [7] connection to server at "asia-northeast2.864dbc14-b507-44e7-9037-54098441dadb.gcp.ybdb.io" (34.97.213.115), port 5433 failed: FATAL: remaining connection slots are reserved for non-replication superuser connections in /virtual/eucn/public_html/var/Typecho/Db/Adapter/Pdo.php:62 Stack trace: #0 /virtual/eucn/public_html/var/Typecho/Db.php(218): Typecho\Db\Adapter\Pdo->connect() #1 /virtual/eucn/public_html/var/Typecho/Db.php(301): Typecho\Db->selectDb() #2 /virtual/eucn/public_html/var/Widget/Options.php(147): Typecho\Db->select() #3 /virtual/eucn/public_html/var/Typecho/Widget.php(155): Widget\Options->execute() #4 /virtual/eucn/public_html/var/Typecho/Widget.php(187): Typecho\Widget::widget() #5 /virtual/eucn/public_html/var/Widget/Init.php(82): Typecho\Widget::alloc() #6 /virtual/eucn/public_html/var/Typecho/Widget.php(155): Widget\Init->execute() #7 /virtual/eucn/public_html/var/Typecho/Widget.php(187): Typecho\Widget::widget() #8 /virtual/eucn/public_html/index.php(17): Typecho\Widget::alloc() #9 {main}