Extension of Partnersh (LLC) returns rejected by IRS for same EIN??

[skyworks]

Hi,

I filed extention for LLC's for the same customer, both were rejected by IRS.

The error messes:

Taxpayer EIN in the Return Header must not be the same as an EIN of a previously accepted electronic return for the return type and tax period and Type of Return Code indicated for the tax return type.

Anyone know what is going on?

This is my new customer, first year preparing their return.

thanks

[skyworks]

Solved, someone filed extension before me