Unconscious

You are Incapacitated and Prone, drop what you are holding, and are unaware of your surroundings. Speed is 0 and cannot increase. Attacks against you have Advantage. You automatically fail Strength and Dexterity saving throws. Any attack that hits is a Critical Hit if the attacker is within 5 feet. When Unconscious ends, you remain Prone until you stand or another rule ends Prone.

Duration and overlapping effects

The effect that caused the condition determines its duration, removal, and any saving throws. If several effects impose the same condition, track each duration; its effects do not grow stronger merely because it was imposed more than once. Other conditions can still apply at the same time.

Source: supplied Player’s Handbook (2024), Rules Glossary. Paraphrased quick reference; specific rules can override these general rules.