This Gauge32 holds the highest single-sample count of PCIe unsupported request errors that UCS Manager observed during any one collection interval within the last 14 days, i.e. the device received a PCIe transaction (e.g. an access to an unimplemented register or capability) that it does not support, captured at its worst moment. Unlike the plain (non-H) gauge for this window, this high-water value stays latched at the worst reading for the rest of the window even if the fault stops recurring, which is what lets an admin catch a brief PCIe error burst that a simple end-of-window snapshot would have missed. For example, if a marginal riser produced a spike of 27 PCIe unsupported request errors in one polling cycle and then went quiet, this field would hold 27 until the last 14 days window rolls forward, even though the plain gauge has since dropped to 0.