A solution with the same name or id already exists in the solution .

Generally we receive this type of error while deploying.

Do following stuff to resolve.

1] Enable Always Force Install to True in for your feature. If not working do 2 sept

2] Check Sharepoint Timer Job is stopped. If stopped restart it. If not working do 3 spet

3] Remove wsp and try to deploy using powershell. If not working do 4 step.

4] Perform following powershell script.

Get-SPFeature | ? { !$_.Scope } | % { $_.Delete() }

refer link