How to make non-editable fields if they have already been filled previously?

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Language: English
Channel Number: 13069283
Article Number: 833
Date: November 7, 2016, 4:29 am
URL: https://wordpress.org/support/topic/how-to-make-non-editable-fields-if-they-have-already-been-filled-previously/
GUID: https://wordpress.org/support/topic/how-to-make-non-editable-fields-if-they-have-already-been-filled-previously/