Trying to update all our SQL 2016 servers to SP2 CU 15, but am running into:
The version of SQL Server instance MSSQLSERVER does not match the version expected by the SQL Server update. The installed SQL Server product version is 13.1.4001.0, and the expected SQL Server version is 13.2.5026.0.
SSMS shows the server to be at 13.0.4259.0
Microsoft SQL Server 2016 (SP1-GDR) (KB4505219) - 13.0.4259.0 (X64) Jun 15 2019 19:20:12 Copyright (c) Microsoft Corporation Standard Edition (64-bit) on Windows Server 2016 Datacenter 6.3 <X64> (Build 14393: ) (Hypervisor)
What do I need to do to get the SP2 CU 15 patch applied to this server?