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Once the old bedding layer is removed, add fresh gravel to the excavated area. Use a shovel or trowel to spread the gravel evenly, creating a consistent layer. Then, use a hand tamper to thoroughly compact the gravel base. Repeat the process of adding gravel and compacting until the base is brought up to the desired grade, which should be slightly below the level of the surrounding undisturbed pavers to allow for the bedding sand. Next, pour new concrete sand (often labeled as bedding sand or coarse sand) over the compacted gravel base. Use a flat trowel or a straight edge (screed board) to spread and level the sand, creating a smooth, uniform surface for the pavers to rest on. The goal is to achieve a stable, properly graded sub-base.