Go to People > Assignments. Locate the assignment
templates you want to clone.
Use search or Filter options to return the desired template
or templates.
Select the assignment templates.
Click Clone.
In Clone Template, enter the number of times you want
to clone the selected templates in Quantity.
Information: The number of items to be cloned per
instance is 1000. For example, selecting 200 templates and setting
the quantity to 6 totals 1200 items and therefore invalid.