a) We are having a Page with the name Sigma
b) Created a new page B with the alias name as sigma(same as page A).
c) We are activating the new Page (Page B) which is having an alias name Sigma.
d) Then we have deactivated page A.
e) When we access page B through the dispatcher using the alias 'sigma' we get a 404 error.
f) We cleared the dispatcher cache and tried resulting in the same issue.
g) We tried accessing the page in the publisher directly and faced the same issue. Also couldn't find any errors in the logs.
Secondly, Whenever we are activating the Alias Page then at the time Original page is also getting activated.