Journal message returns "ConversionFailedException"

Symptoms 

A Journal message gets stuck in the submission queue and returns the following error message: 

Resolution 

To fix this issue, install the following cumulative updates, as appropriate:

• For Exchange Server 2019, install:
  
  Cumulative Update 13 for Exchange Server 2019 (KB5020999) or a later cumulative update

• For Exchange Server 2016, install:
  
  Hotfix update for Exchange Server 2016 CU23 HU16: May 29, 2025 (KB5057653)