What kind of change does this PR introduce?

Fix For #1733

What is the current behavior?

Accidental sealing of Attributes made

What is the new behavior?

Reverted to unsealed, added note to ensure unsealed attributed are not sealed again.

What might this PR break?

Reverting of previous functionality.

Please check if the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Other information: