sins unintentionally: Damage to sacred property (objects or land set apart for God) was treated differently from damage to ordinary property. A sacrifice could only restore sacred property if the damage was done by accident. If someone harmed sacred things on purpose, such as vandalizing them, it was considered blasphemy (disrespect toward God).
As with other deliberate sins, there was no specific way to atone for it (see Numbers 15:30–31). A true believer would not defiantly continue in sin (see 1 John 3:9).
sanctuary shekel: This was not a coin but a standardized unit of weight. They used it to evaluate the offered ram. Some scholars suggest this text allows substituting the appropriate amount of silver for the ram.