What does this SQL script do?

Question

SQL

Good afternoon!
Can you please tell me what this script does?
update [dbo].[dvsys_instances]
set ArchiveState = 2
Where InstanceID in
(
SELECT ID
FROM(
Select
Inst. InstanceID [ID]
, case
when [Inst]. '
when [Inst].CardTypeID = '816AE98F-0E9C-4734-B368-642A34948527' then 'SZ'
when [Inst].CardTypeID = '094DEF0A-2CA1-41D8-81B6-70F586FDDE56' then 'VD'
end [Type]
, case
when [Inst].CardTypeID = '2E729D50-6B61-4186-9D14-44E109FD920B' then MainID.[State]
when [Inst].CardTypeID = '
when [Inst].CardTypeID = '094DEF0A-2CA1-41D8-81B6-70F586FDDE56' then MainVD.[State]
end [State]
From [dbo].[dvsys_instances] [Inst]
left join [dbo].[dvsys_instances_date] [IDate ]
on Inst.InstanceID = IDate.InstanceID
left join [dbo].[dvtable_{4C07CA25-41D6-438A-B73E-47FE7650C7BD}] MainID
on Inst.InstanceID = MainID.InstanceID
left join [dbo].[dvtable_{B5D96F96-ACA2 -4184-9702-2D89B1B3936A}] MainSZ
on Inst.InstanceID = MainSZ.InstanceID
left join [dbo].[dvtable_{C06228B9-99F8-4B41-950B-8FACDC00A2B7}] MainVD
on Inst.InstanceID = MainVD.InstanceID
Where [Inst
] GETDATE() - 724)
)T1
WHERE (T1.[Type] = 'ID' and T1.[State] in (5,9))
or(T1.[Type] = 'SZ' and T1.[State] in (4,6,9))
or(T1.[Type] = 'VD' and T1.[State] in (5,6)
)
EXEC [dbo].[dvsys_archive_cards]
There is a DocsVision database and this script should archive various types of documents into archive tables, but something doesn't work

Answer 1

The update statement only sets the ArchiveState field in the dvsys_instances table to 2 for the selected records. The entire text of the request is actually a filter for selecting records.
The last line calls the dvsys_archive_cards stored procedure.
I assume that this procedure should archive records that have ArchiveState=2.