This article explains the procedure on how to resolve if the object error while importing the IPS policy

A few probable causes for this issue are as follows:

• No active signature Database is present in the Security Director

1. Navigate to SD >> Devices >> Security Devices >> Select the device and click on Import

2. While performing an import of firewall/IPS policy, if you receive an error while reviewing the summary of the configuration

3. By Downloading the SummaryReport.zip, you will be able to find the errors as mentioned in the symptom section

4. If the error refers to Mismatch SigInstall, then navigate to SD >> Administration >> Signature Database >> Download the corresponding signature version 

5. Post downloading the signature database of corresponding version, the issue should be fixed.