How to delete a key field in a Transparent table

Hi,
I have created a Transparent table Zemployee in which there are 4 fields ( id, name, job, hiredate). I intend to make primary key consists of 2 fields (id, name) but by mistake I have included job field as well.
Now I want to change job field from a key field to non-key field, I use SE11 to display the maintainance of the Zemployee table, unmarked the key label column on job field then I save and activate the table but the system fail to activate the Zemployee table.
So now, what shoul I do to solve this problem ?
Thanks,

Hi,
I have tried again and it work well ( use SE14 as you talk). and now I make job field become key-field again and use se11 to change it to non-key field and it work well too. So I think the problem maybe at the network or somethings else.
Thanks and regards,

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