According to the OPC UA specification, it seems permissible to create a node with numeritc type, namespace ≠ 0 and identifier = 0. However, in open62541, if I specify a numeric type with identifier = 0, it gets converted to a random number as following link.
https://www.open62541.org/doc/v1.4.0/server.html#node-addition-and-deletion

I am currently creating an opcua server with the open62541 lib in C.
and I recently implemented a certificate management and a SecurityPolicy(basic256sha256) on the server side. As a client, I am using the open-source program opcua commander, however I have
troubles using it correctly.