MySQL warnings after upgrade: had no or invalid character set...

MySQL warnings after upgrade: had no or invalid character set...

Hi,
We are going to upgrade our AppManager from  8610 to latest release 11520.

After installing the three service packs of  100311104011520, the application works well. But we get many warnings in mysql  .err logs like:

140410 10:01:58 [Warning] './amdb/am_host_process_instance' had no or invalid character set, and default character set is multi-byte, so character column sizes may have changed
140410 10:01:58 [Warning] './amdb/am_host_process_cpumem' had no or invalid character set, and default character set is multi-byte, so character column sizes may have changed
140410 10:02:24 [Warning] './amdb/am_unmanagednodes' had no or invalid character set, and default character set is multi-byte, so character column sizes may have changed
140410 10:02:24 [Warning] './amdb/am_attributethresholdmapper' had no or invalid character set, and default character set is multi-byte, so character column sizes may have changed
140410 10:02:24 [Warning] './amdb/am_attributeactionmapper' had no or invalid character set, and default character set is multi-byte, so character column sizes may have changed
140410 10:02:24 [Warning] './amdb/am_managedobjecthistorydata' had no or invalid character set, and default character set is multi-byte, so character column sizes may have changed
140410 10:02:24 [Warning] './amdb/am_minmaxavgdata' had no or invalid character set, and default character set is multi-byte, so character column sizes may have changed
140410 10:03:22 [Warning] './amdb/am_script_numeric_data' had no or invalid character set, and default character set is multi-byte, so character column sizes may have changed

How can we fix those warnings?

Thanks in advance!!!
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