[CentOS] CentOS-6.9 Bind-9.8.2 error messages

I am encountering messages similar to this in the system logfile:

Jun 20 13:38:18 inet03 named[3720]: malformed transaction:
dynamic/efa1f375d76194fa51a3556a97e641e61685f914d446979da50a551a4333ffd7.mkeys.jnl
last serial 103538 != transaction first serial 103361

I have no idea what this means, what caused it, nor how to fix it. 
Any suggestions relevant to any of the above are most welcome.

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James B. Byrne                mailto:ByrneJB at Harte-Lyne.ca
Harte & Lyne Limited          http://www.harte-lyne.ca
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