can't migrate vcenter 5.5 to 6.5. migration alternative suggestion?

Small environment. 4 hosts. Just got two new ones.
esxi 5.5 the Windows vCenter has had so many issues before my time. All sorts of SQL issues, multiple DB and Full restores from Veeam. old 2008 non R2 server with app crashes and certificate errors out the wazoo. Migration assistant to vcsa is failing, logs full of errors.
That said, the hosts and vcenter do run, and VM's are stable, on the surface.
There is a distributed network switch, so I'm wondering if it's best to just spin up a brand new VCSA. Export distributed network switch from windows vCenter, then import into new vcsa. Then connect the hosts to the new vcenter?
I don't care about retaining any historical data.
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Ajay ChananaMCSE-2003/08|RHCSA| VCP5/6 |vExpert2018Commented:
This might give you issue, as the version is different,  the export and restore of DV switch helps when you are migrating on the same version.

The other way is to move the host to standard switch  remove the dvs configuration.

All the host back to new vCenter  server and migrate to DVS again.

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art leeCommented:
backup dv's config and import or restore it on to new dvs
Build a new vCenter (VC) and then on the original VC as above backup vds config's using a method list in the link:

A standard switch may have to be used first on the new VC if the host ESXi is not at the same version as the VC.
The VM's may need to be shutdown to be migrated to the new VC
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