Security development tool | Install Ax Model error

Hi everyone.

I'm having problems while installing Security development tool in MS Dynamics AX 2012 R3 CU10.
I've installed successfully the SecurityDevelopmentTool.msi. But when I enter comand in MS Dynamics management Shell, it returns the error as follow:
"One or more conflicting model elements already exists in an installed model".

Any help will be appreciated.