This is caused by one or more workstations in the network having the same SMBIOS GUID, aka System UUID in SCCM terms.
On the workstation that cannot run a Task Sequence, launch a command prompt in WinPE by pressing SHIFT + F10 and drop into the WMIC CLI by issuing this command:
At the prompt wmic:root\cli>, get the SMBIOS GUID by issuing:
csproduct get uuid
Paste this into a new text document using notepad and then transfer to SCCM. We’ll build a query using the System UUID to find the conflicting workstations.
net use j: \\sccmServer\share /user:domainName\userName
We’ll enter that System UUID into a Device Collection Query: