Regex doesnt work after kong upgrade to version 3.x - regex

Question

Regex doesnt work after kong upgrade to version 3.x.
After upgrading from kong 2.7 to 3.2, regex stopped working.
Regex pattern used in 2.7: /payment/(docs|health)
Regex pattern used in 3.2: /~payment/(docs|health)
Also tried to use ~/payment/(docs|health), but it gives error as in screenshot
Pathtype is ImplementationSpecific
- apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
labels:
app.kubernetes.io/name: payment-svc
name: payment-without-auth
namespace: payment
spec:
ingressClassName: kong
rules:
- host: abc.example.com
http:
paths:
- backend:
service:
name: payment-svc
port:
number: 80
path: /payment/(docs|health)
pathType: ImplementationSpecific
Tried couple if regex changes.

Answer 1

To complement #kranthiveer-dontineni's answer, you'll need the /~ prefix in kubernetes manifests to make this work
Ingress paths that begin with /~ are now treated as regular
expressions, and are translated into a Kong route path that begins
with ~ instead of /~. To preserve the existing translation, set
konghq.com/regex-prefix to some value. For example, if you set
konghq.com/regex-prefix: /#, paths beginning with /~ will result in
route paths beginning in /~, whereas paths beginning in /# will result
in route paths beginning in ~. #2956
https://github.com/Kong/kubernetes-ingress-controller/blob/main/CHANGELOG.md#breaking-changes-1

Answer 2

If you have upgraded your kong deployment from 2.8.X to 3.0 the prefix(~) will be added to the routes in the database automatically and results in a configuration drift between the routes database and config file, as per the official documentation.
Before using your state files to update the database, convert them into the 3.0 format using the deck convert command.
Important: Don’t use deck sync with Kong Gateway 3.x before converting paths into the 3.0 format. This will break all regex routing in 3.x.
Run deck-convert against your 2.x state file to turn it into a 3.x file:
deck convert --from kong-gateway-2.x --to kong-gateway-3.x --input-file kong.yaml --output-file new-kong.yaml
Note: This content is taken from official kong documentation. Refer to this link for more information.