> Source: [sk176365](https://support.checkpoint.com/results/sk/sk176365)

# sk176365 - IPS updates stop working after an upgrade

| Property | Value |
|----------|-------|
| Solution ID | sk176365 |
| Date Created | 2021-11-22 |
| Last Modified | 2021-12-01 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R81 (EOS) |

## Symptoms

- * After an upgrade from R80.30 to R81 , IPS can not be updated.

* These logs are found in $FWDIR/log/CPM.elg:  

  `
  Failed to deserialize object 'SDT_asm_dynamic_prop_mpe_block' of class com.checkpoint.objects.ips_classes.dummy.CpmiSdTopicPerProfileDynamic. set: . Error: java.lang.IllegalArgumentException: com.checkpoint.management.coresvc.ObjectNotFoundException: Object not found - Too many objects with name='Threat_Prevalence_Rare' table 'ips_tags'. `

## Cause

"Threat_Prevalence_Rare" objects were duplicates; in every upgrade, one object is created and the older one is removed.

## Solution

This problem was fixed. The fix is included in:

* [Check Point R81.10](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk170416)
* [Check Point R81](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk166715)

The fix for this issue is integrated into the Upgrade tool build number 995000426.  
Check Point recommends to always upgrade to the most recent version.

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