Bydd y weithred hon yn dileu'n barhaol bob tasg sydd wedi'i marcio wedi'i chwblhau. Os wnewch chi barhau, fedrwch chi ddim adfer y tasgau yma. Dileu'r tasgau yma go iawn?
This operation will permanently erase all tasks marked as completed. If you continue, you will not be able to recover these tasks. Really erase these tasks?