Sayyidah Aishah (may Allah be pleased with her) said: The Messenger of Allah (peace and blessings be upon him) left me happy and in good spirits, and when he returned he was sad. I asked: When you (peace and blessings be upon him) left, you were like such and such? He (peace and blessings be upon him) said: "I entered the Ka'bah, and now I wish I had not done so. I fear that I have burdened my Ummah after me."
The Shaykh (may Allah have mercy on him) said: This must have been during his Hajj, while the hadith of Ibn Abi Awfa (may Allah be pleased with him) concerns his Umrah, so the two do not contradict each other.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9729