What is the meaning of Colossians 1:24?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

Now I rejoice in my sufferings for you, and I fill up in my flesh what is lacking in regard to Christ’s afflictions for the sake of His body, which is the church.

Berean Standard Bible (BSB)

Now I rejoice in my sufferings for your sake, and fill up on my part that which is lacking of the afflictions of Christ in my flesh for his body’s sake, which is the assembly;

World English Bible (WEB)

Who{G3739} now{G3568} rejoice{G5463}{(G5719)} in{G1722} my{G3450} sufferings{G3804} for{G5228} you{G5216}, and{G2532} fill up{G466}{(G5719)} that which is behind{G5303} of the afflictions{G2347} of Christ{G5547} in{G1722} my{G3450} flesh{G4561} for{G5228} his{G846} body's{G4983} sake{G5228}, which is{G3603}{(G5748)} the church{G1577}:

Strong's King James

(24) Now I rejoice gladly in my sufferings for your sake and in my flesh on behalf of His body which is the assembly, completely filling up what's lacking, in The Mashiach's afflictions.

The F.O.G*

[24] Now I rejoice in my sufferings for you, and I fill up in my physical body what is still lacking in regard to Messiah's afflictions, for the sake of His body, which is the church.

The F.O.G Paraphrase

I now rejoice in my sufferings for you, and do fill up the things lacking of the tribulations of the Christ in my flesh for his body, which is the assembly,

Young's Literal Translation