When you model a Cisco Catalyst 2960X-48FPS-L switch, Spectrum gives it a Device Type of Cat WSC2960S 48TSL.
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Cisco reports the wrong sysObjectId for the Catalyst 2960X-48FPS-L Switch. The agent says the sysObjectId is 1.3.6.1.4.1.9.1.1695, when it should be 1.3.6.1.4.1.9.1.1208. Cisco has confirmed a bug in the firmware.
Reference https://supportforums.cisco.com/discussion/11996561/cisco-catalyst-2960-x-and-cisco-prime-compatibility
Please contact Cisco support.