SQL Anywhere Error -196: Index

Hello,

I have updated MBO's since some attributes changed then i got following error:

"com.sybase.jdbc3.jdbc.SybSQLException:SQL Anywhere Error -196: Index '_BUSINESS_PK_INDEX_d1_<p>projects_1_0__24521' for table 'd1_<p>projects_1_0__24521' would not be unique","component"

Although  i cleaned the cache DB when i call a RFC it returns that error . Dont have any clue what causes this. Im using 2.1.3 sp3 version

Does anybody faced same error ?  what is the best way to update mbo's  clearly?

Thanks in advanced

Tahir