Error when activating update rule

HI BI Expert,

The original transfer rule for 2LIS_11_VAITM was deleted accidently and I created new one and mapped with the existing infosource. The system always generates the following error at the time of transport to another client.

Error when activating update rule D1GOAPD9O0P9CFOY8KBSOUDFA

Activation of the update rules for ZO_SOP_1 ZT_SOP_SALO_ITM

IC=ZO_SOP_1 IS=ZT_SOP_SALO_ITM error when checking the update rules.

Would you kindly be able to suggest me what steps I need to take so as to correct this issue?

Thanks.