Duplicate formula found: Processing Dimension

Hi Experts,

I am getting the following error when processing the ACCOUNT dimension

Failed to expand K2 function for dimension ACCOUNT's member formulas

Duplicate formula found: "[ ACCOUNT ].[# K_COS_LTBOM_FTPRC_PK ] =[ACCOUNT].["

The member K_COS_LTBOM_FTPRC_PK has formula [K_GM_COS_MTH_PKG]. I have checked if the member K_GM_COS_MTH_PKG has any formula but there are no formula for the member K_GM_COS_MTH_PKG. I tried removing all the formulas from the Formula column and process the dimension and it was successful. I started adding the formulas one by one to know which one is causing the problem and found the problem with the member

K_COS_LTBOM_FTPRC_PK

Thanks for your help in advance,

Rohit