At your Reach, one Curse affecting a Target or object ends. If the object is a cursed Magic item, its Curse remains, but the Spell breaks its owner's attunement to the object so it can be removed or discarded. However, this is also up to the dicression of the GM to determine the power of the Curse, then the required upcast might be required.

Most Curses can be more powerful. With a successful Identify, or knowledge roll Magic, the Curse can be identified. Thus requiring the Caster to upcast using Mana equal to, this is: Curse Spell level + 1. This also requires a similar roll to Dispel Magic, and Counterspell, using the Spell Attack Roll of the decurser vs. the DC of the curser spellcasting, meeting or beating the DC is required to remove the Curse.

There might be also certain prerequisites written in the Curse description, or GM discretion, to be met before before this Spell to work, otherwise this Spell fails.