Problem preparing the X formula within Y. TypeError: formula.replace is not a function

[dev7355608]

Reproduction:

1. Grab Akra from the Starter Heroes.
2. Call akra.prepareData().

activated-effect.mjs:193 Problem preparing the Maximum Uses formula within Hempen Rope (50 ft.). TypeError: formula.replace is not a function
    at replaceFormulaData (utils.mjs:94:21)
    at ConsumableData._prepareFinalFormula (activated-effect.mjs:187:38)
    at ConsumableData.prepareFinalActivatedEffectData (activated-effect.mjs:129:10)
    at ConsumableData.prepareFinalData (consumable.mjs:95:10)
    at Item5e.prepareFinalAttributes (item.mjs:669:35)
    at actor.mjs:149:37
    at EmbeddedCollection.forEach (foundry-esm.js:5027:9)
    at Actor5e.prepareData (actor.mjs:149:16)
    at <anonymous>:1:23