When restoring DB, Incorrect syntax near 's' error will popup.
To solve this, follow the below steps.
Step 1 : Go to DB restore page (Select DB -> right click -> select Tasks -> Restore -> Database).
Step 2 : Click options.
Step 3 : Enable overwrite & close application (as shown in the below pic).
Step 4 : Click general, select DB & click OK to restore.
Note: Restoring DB should have .bak extension. Place the DB file in default SQL backup in c drive.
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