SQL Error 3154 and 3013

How to fix  the SQL backup  Error 3154 and 3013?

Today we have faced below error  msg while restoring sql backup file from drive .
Msg 3154, Level 16, State 4, Line 1
The backup set holds a backup of a database other than the existing 'ITAssist' database.
Msg 3013, Level 16, State 1, Line 1
RESTORE DATABASE is terminating abnormally.
 
Solution :
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First i was tried to restore the backup as shown below

Restore database ITAssist from disk =' C:\MSSQL_default\Data\backup\ITAssit.bak'

I ran the above query , i have received below error msg

Msg 3154, Level 16, State 4, Line 1
The backup set holds a backup of a database other than the existing 'ITAssist' database.
Msg 3013, Level 16, State 1, Line 1
RESTORE DATABASE is terminating abnormally.

Solution is very simple and not as difficult . I was trying to restore the database on another existing active database. 

1) Use WITH REPLACE while using the RESTORE command.

Restore database ITAssist from disk =' C:\MSSQL_default\Data\backup\ITAssit.bak' with Replace

2) Delete the older database which is conflicting and restore again using RESTORE command.