Pgbouncer returns this error frequently on many of my database connections. I can’t figure out what exactly is causing this error.

2024-06-12 13:02:23.005 +03 [2865569] LOG C-0x56059d2f0410: db_name/user_name@IP_Adrr:64507 closing because: server conn crashed? (age=151s)
2024-06-12 13:02:23.005 +03 [2865569] WARNING C-0x56059d2f0410: db_name/user_name@IP_Adrr:64507 pooler error: server conn crashed?
2024-06-12 13:04:41.649 +03 [2865569] LOG S-0x56059d2e5e30: db_name/user_name@IP_Adrr:5438 closing because: server conn crashed? (age=9s)
2024-06-12 13:04:41.649 +03 [2865569] LOG C-0x56059d2e9900: db_name/user_name@IP_Adrr:12012 closing because: server conn crashed? (age=176s)
2024-06-12 13:04:41.649 +03 [2865569] WARNING C-0x56059d2e9900: db_name/user_name@IP_Adrr:12012 pooler error: server conn crashed?
2024-06-12 13:06:11.077 +03 [2865569] LOG S-0x56059d2e0480: db_name/user_name@IP_Adrr:5438 closing because: server conn crashed? (age=53s)
2024-06-12 13:06:11.077 +03 [2865569] LOG C-0x56059d2f50a0: db_name/user_name@IP_Adrr:11403 closing because: server conn crashed? (age=91s)
2024-06-12 13:06:11.077 +03 [2865569] WARNING C-0x56059d2f50a0: db_name/user_name@IP_Adrr:11403 pooler error: server conn crashed?
2024-06-12 13:24:14.772 +03 [2865569] LOG S-0x56059d2ffb40: db_name/user_name@IP_Adrr:5433 closing because: server conn crashed? (age=1s)
2024-06-12 13:24:14.772 +03 [2865569] LOG C-0x56059d30e110: db_name/user_name@IP_Adrr:27698 closing because: server conn crashed? (age=18s)
2024-06-12 13:24:14.772 +03 [2865569] WARNING C-0x56059d30e110: db_name/user_name@IP_Adrr:27698 pooler error: server conn crashed?

I couldn’t find a clear configuration parameter for this particular error. What is the solution to this error?

Postgresql Version: 13.3

Pgbouncer Version: 1.15

Thanks.