You can delete all timestamps or you can select a group of one or more timestamps to delete.
To delete timestamps for a data group, do the following:
From the Work with Data Groups display, type 41 (Timestamps) next to the data group you want and press Enter.
The Work with DG Timestamps display appears. Type a 4 (Delete) next to the timestamps you want to delete and press Enter.
A confirmation screen appears. Press Enter.
To selectively delete a range of timestamps, do the following:
Type the command DLTDGTSP and press F4 (Prompt).
The Delete Data Group Timestamps display appears. Specify values you want for the Data group definition prompt.
Specify the values you want for the Starting date and time prompt and for the Ending date and time prompt, then press Enter.