Update custom chart data and type only

Editor assessment

The subject says custom chart data and type are updated 'only', an adverb whose meaning — limiting the update to those two properties rather than others — is ambiguous without the diff. The fix type fits a scoped data correction. No scope or body explains which chart properties were incorrectly overwritten before or why the narrowing matters, which is the context this change rests on. No footers appear. Understandable at the area level, but the ambiguity of 'only' and the absent rationale hold the message at acceptable.