[Resolved] Use Correlation Names

I have a working sp:

SELECT dbo.Job.CompanyJobId, dbo.Item.UnitOfMeasure, dbo.Job.Name, dbo.Job.ChangeDate,
dbo.Region.CompanyRegionID, dbo.Job.Active,
sum(case dbo.SourceType.CompanySourceTypeId WHEN 'MA' then dbo.ProductionEvent.AlternateQuantity ELSE 0 END) AS material,
sum(case dbo.SourceType.CompanySourceTypeId WHEN 'PR' THEN dbo.ProductionEvent.Quantity ELSE 0 END) AS production

FROM dbo.job
inner join dbo.Event ON dbo.Job.JobGuid = dbo.Event.JobGuid
inner join dbo.ProductionEvent on dbo.Event.EventGuid = dbo.ProductionEvent.EventGuid
left outer join dbo.Product ON dbo.ProductionEvent.ProductGuid = dbo.Product.ProductGuid
left outer JOIN dbo.Item ON dbo.Event.ItemGuid = dbo.Item.ItemGuid
inner JOIN dbo.Source ON dbo.ProductionEvent.SourceGuid = dbo.Source.SourceGuid
inner JOIN dbo.SourceType ON dbo.Source.SourceTypeGuid = dbo.SourceType.SourceTypeGuid
left OUTER JOIN dbo.Region ON dbo.Job.RegionGuid = dbo.Region.RegionGuid

WHERE dbo.Job.CompanyJobId = 3505048 and dbo.Item.UnitOfMeasure = 'TN'
and(dbo.SourceType.CompanySourceTypeId = 'PR' or dbo.SourceType.CompanySourceTypeId = 'MA')

GROUP BY dbo.Job.CompanyJobId, fMeasure, dbo.Region.CompanyRegionID,
dbo.Job.Name, dbo.Job.ChangeDate, dbo.Job.Active

Now I need to inser another join like this:

dbo.Event ON dbo.EmployeeLaborEvent.EventGuid = dbo.Event.EventGuid INNER JOIN

and I get error:

Server: Msg 1013, Level 15, State 1, Line 15
Tables or functions 'dbo.Event' and 'dbo.Event' have the same exposed names. Use correlation names to distinguish them.

Not sure what this means. Thank you.