A conflict occurs when the available source cannot satisfy every schedule at the same time. The usual cause is a tuner or concurrent-stream limit.
Open the conflict in DVR and compare the programmes, channels, start and end padding, repeat availability, and schedule priority. Keep the recording that is harder to replace and choose another airing for the other programme when one exists.
Large start or end padding can turn two otherwise separate programmes into an overlap. Reduce it only when the broadcaster’s timing is reliable enough.
Do not raise the tuner limit unless the source actually supports the additional stream. Doing so moves the failure from scheduling time to the recording itself.