fixed asset remaining depreciation periods

Hi all,

Users as created news fixed assets and put acquisition and depreciation journals.
there created more than 1000 fixed assets.

the seen that depreciation periods remaining as zero. . after the analysis we found that forget to enable depreciation in a value model. after I have enabled depreciation.still remaining depreciation periods as zero.
fixed asset -> value model

enabled  depreciation

setup-> value model -> fixed asset

please help me how to fix it.