Nottingham Forest midfielder David Vaughan says the mistakes need be cut out of the side as they are gifting the opposition the points.
Defensive errors proved costly for The Reds on Saturday as they lost at Ipswich Town, and Vaughan knows they need to improve.
Speaking after the game, he said: "We played well in patches but we have come out on the losing side and conceded some poor goals so it is something we have got to learn from. We have said it a few times so we need to change it.
"There were a couple of individual mistakes, such as from myself and Mance, but we had some chances as well and it just wasn't to be our day today.
"We all make mistakes and at the moment we seem to get punished for them. We need to eradicate those mistakes because we are playing well generally. We just need to be a bit stronger defensively as if we concede four goals we aren't likely to win the game.
"Kieran and Tyler took their goals really well and we had to work so hard to score but conceded easy goals; that gives us something to work on.
"We have lost the game ourselves really. We had a slow start and mistakes from individuals have cost us the game. We can't keep doing that as we will end up looking over our shoulders again like we did last season."