ERROR: incompatible library

<div class="Section1"><p class="MsoNormal">Hello lists,<p class="MsoNormal"> <p class="MsoNormal">I am trying to run
Slonyon a Master Postgres 8.1.11 replicating to a Slave same version and 2<sup>nd</sup> Slave Postgres 8.3.4.<p
class="MsoNormal">Thepurpose is to update Postgres in production by steps, first slaves then switchover to upgrade the
masterthat will not be master when upgraded.<p class="MsoNormal"> <p class="MsoNormal">I am getting the following
error:<pclass="MsoNormal"> <p class="MsoNormal"><span style="font-family:"Courier New""><stdin>:14:
PGRES_FATAL_ERRORload '$libdir/xxid';  - ERROR:  incompatible library "/usr/lib/pgsql/xxid.so": missing magic
block</span><pclass="MsoNormal"><span style="font-family:"Courier New"">HINT:  Extension libraries are required to use
thePG_MODULE_MAGIC macro.</span><p class="MsoNormal"><span style="font-family:"Courier New""><stdin>:14: Error:
theextension for the xxid data type cannot be loaded in database 'dbname=hdap host=10.0.100.234 port=6543 user=myuser
password=mp’</span><pclass="MsoNormal"><span style="font-family:"Courier New""> </span><p class="MsoNormal"><span
style="font-family:"CourierNew""> </span><p class="MsoNormal"><span style="font-family:"Courier New"">Is this mean that
Slonycan not replicate into a newer postgres version?</span><p class="MsoNormal"><span style="font-family:"Courier
New"">Ifit does, then how do I fix this problem?</span><p class="MsoNormal"><span style="font-family:"Courier
New""> </span><pclass="MsoNormal"><span style="font-family:"Courier New"">Thanks for your help,</span><p
class="MsoNormal"><spanstyle="font-family:"Courier New""> </span><p class="MsoNormal"><span style="font-family:"Courier
New"">TonyFernandez</span></div>