Read Hebrews 8:13 Using Other Translations
In that he saith, A new covenant, he hath made the first old. Now that which decayeth and waxeth old is ready to vanish away.
In speaking of a new covenant, he makes the first one obsolete. And what is becoming obsolete and growing old is ready to vanish away.
When God speaks of a “new” covenant, it means he has made the first one obsolete. It is now out of date and will soon disappear.