Suggestions for WikiTree Profiles: Error 897: Error in template parameters Help (Difficulty: Intermediate)

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Link Info Name Rel. Birth Death Gender Manager Marriage Status
McKinley-184
H
invalid format: ^\d{1,4} ?- ?\d{1,4}$: Named parameter: years1
{{Succession
|image=US_Images-23.png
|position1= 25th President
of the Uni...
President William McKinley Jr. certain 29 Jan 1843 certain Niles, Trumbull, Ohio, United States certain 14 Sep 1901 certain Buffalo, Erie, New York, United States Male WikiTree-6
Garfield-39
H
invalid format: ^\d{1,4} ?- ?\d{1,4}$: Named parameter: years1
{{Succession
|image=US_Images-23.png
|years1=1881
|position1=James Abram Garf...
President James Abram Garfield 19 Nov 1831 certain Orange, Cuyahoga, Ohio, United States 19 Sep 1881 Washington, District of Columbia, United States Male WikiTree-6

Jones-7503