Either the IP address or the mask is misconfigured on one of the neighboring interfaces.
One router is configured as a stub area router, and the other is not.
The receiving router is configured for MD5 (type 2) authentication, and the neighbor has no authentication configured (type 0).
The passwords configured on the two routers do not match.
The neighboring interfaces are not configured with the same area ID.
RTA's network statements are in the wrong order. The first statement matches IP address 192.168.50.242 and puts it in area 192.168.50.0.
Link ID 10.8.5.1 is the most likely suspect because its sequence number is substantially higher than the sequence numbers of the other links.