Purchase req ME51n additional screen

Hi,

I am creating addtional screen in ME51N transaction using SAPLXM02 0111 which is the screen exit, when I save it saves to local object default, it doesn't ask for package, when I go to se80 to change package , there is no option to change. I tried many times deleting and creating again but in vain.

Initially I created screen in sandbox saved it to package and created a transport,later I deleted screen and object from transport.

Now when I create the screen in Dev client, it saves to local package.

Could anyone let me know what might be the issue?

Thanks