There should not be two Witr prayers during one night
Authentic hadithعن قيس بن طلق، قال: زارنا طلْق بن علي في يوم من رمضان، وأَمْسى عندنا، وأفطر، ثم قام بنا الليلة، وأَوْتَرَ بنا، ثم انحدر إلى مسجده، فصلى بأصحابه، حتى إذا بقي الوتر قَدَّمَ رجلا، فقال: أَوْتِرْ بأصحابك، فإني سمعت النبي صلى الله عليه وسلم يقول: «لا وِتْرَانِ في ليلة».
Qays ibn Talq reported: Talq ibn ‘Ali visited us one day during Ramadan. He stayed with us until the evening and broke his fast with us. Then he led us in voluntary night prayer and the Witr prayer. Afterwards he went to his mosque and led his companions in prayer. When only the Witr prayer was remaining, he asked another man to step forward and said: ‘Lead your companions in the Witr prayer, because I heard the Messenger of Allah (may Allah's peace and blessings be upon him) saying: "There should not be two Witr prayers during one night."
Explanation
In this Hadīth, the noble Companion, Talq ibn ‘Ali (may Allah be pleased with him) explained that he offered the Witr prayer with his family at the beginning of the night and then he led his people in prayer, but he did not pray the Witr prayer with them. Instead, he let another man lead them in the Witr prayer, because he had heard the Prophet (may Allah's peace and blessings be upon him) prohibiting Muslims from offering two Witr prayers in one night.
Source · Narrated by At-Termedhy - An-Nasaa’i - Narrated by Abu Daoud - Narrated by Ahmad
From the Hadith Encyclopedia (hadeethenc.com).