angular-typescript: the generated methods(representing the APIs) in the controller have a number suffix

Description

I have an exposed file from spring boot server
and I am using this script to generate a typescript angular client

openapi-generator-cli generate -g typescript-angular -i ./src/app/data/open-api.json -o ./src/app/data/build/openapi

there are duplicated api names among the system

simple structure

Controller1 : [get,list,delete,... ....]
Controller2 : [get,list,delete,... ....]
.....

the generated classes looks like

Controller1Service{
public get1 ....
public list1 .....
}
Controller2Service{
public get2 ....
public list2 .....
}

but the functions are unique in the same controller and the generator still adding numbers to them

openapi-generator version

4.3.1 using npm cli

OpenAPI declaration file content or url

Command line used for generation

openapi-generator-cli generate -g typescript-angular -i ./src/app/data/open-api.json -o ./src/app/data/build/openapi

Start by running the stated openapi-generator-cli command with the reported open-api.json and inspect the generated Controller1Service and Controller2Service methods. Trace the typescript-angular generator or templates responsible for method naming, then verify that names unique within each controller are generated without unnecessary number suffixes.